15 Best Kid Alarm Clocks

Product info

Sound machine choose from 17 high-quality smoothing sounds: thunder, ocean, rain, summer night,frog,cat,sheep,cow,duck. features auto-off timer or play whole night continuously. touch sensitive night lightbenefit sleep timer function lets you fall sleep with night light for a certain time then auto turn off. 3 brightness for warm/white light.color lights can change automatically or fix a color you like. just touch to turn on/off or choose color and brightness. Multi-functional alarm clock17 nature sounds.features snooze,12/24 hour format,adjustable volume, backlight dimmable. How it works at a young age, toddlers know the icons and understand that the sun means it's time to get up or get out of bed. during the night , the clock gently glows a moon, children know it's time to sleep or stay in bed until the sun shows.

• TOUCH SENSITIVE NIGHT LIGHTBenefit sleep timer function lets you fall sleep with night light for a certain time then auto turn off. 3 brightness for warm/white light.color lights can change automatically or fix a color you like. Just touch to turn on/off or choose color and brightness.
• HOW IT WORKS At a young age, toddlers know the icons and understand that the sun means it's time to get up or get out of bed. During the night , the clock gently glows a moon, children know it's time to sleep or stay in bed until the sun shows.
• SOUND MACHINE Choose from 17 high-quality smoothing sounds: Thunder, Ocean, Rain, Summer Night,Frog,Cat,Sheep,Cow,Duck. Features AUTO-OFF TIMER or play whole night continuously.
• MULTI-FUNCTIONAL ALARM CLOCK17 nature sounds.Features snooze,12/24 hour format,adjustable volume, backlight dimmable.

Product info

7 color light & 20 brightness adjustable there are 7 color changing light you can choose, include blue, indigo, purple, red, orange, yellow, green. 3 level led time display brightness & 20 level lighting brightness adjustable. Night light & bedside lampit is also a bedside lamp / night light / reading lamp. it will be a bedside lamp / night light / reading lamp just when you press the button on the upper left to switch it on. also you can press the "+" / "-" button to adjust the brightness. soft and warm lighting gives you good sight when you feed your baby / go to the toilet / read a book at night. Wake up light with sunrise simulation this sleep aid digital alarm clock is designed for everyone in fact, especially for heavy sleepers and kids. sunrise simulation light with 7 natural sounds will be on gradually from 10% brightness to 100% by 30 minutes before alarm setting time. if you think 30 minutes is too long, you can set the process to 20 minutes or 10 minutes. wake you up by nature. Fm radio & 7 alarm soundsit will be a fm radio just when you press the "radio" button on the upper right to switch it on. long press the "fm radio" button for 2 secs and it will start and automatically scan all stations with frequency 76 - 108 mhz. it's amazing that you can choose 7 alarm sounds to wake you up, such as birdsong, ocean wave, streams, beep, wind bells, soft music, piano music. 16 level volume adjustable.

• FM Radio & 7 Alarm SoundsIt will be a FM Radio just when you press the "Radio" button on the upper right to switch it on. Long press the "FM Radio" button for 2 secs and it will start and automatically scan all stations with frequency 76 - 108 MHz. It's amazing that you can choose 7 alarm sounds to wake you up, such as Birdsong, Ocean Wave, Streams, Beep, Wind bells, Soft Music, Piano Music. 16 Level volume adjustable.
• Night Light & Bedside LampIt is also a Bedside Lamp / Night Light / Reading Lamp. It will be a bedside lamp / night light / reading lamp just when you press the button on the upper left to switch it on. Also you can press the "+" / "-" button to adjust the brightness. Soft and warm lighting gives you good sight when you feed your baby / go to the toilet / read a book at night.
• Wake Up Light with Sunrise simulation This Sleep Aid digital alarm clock is designed for everyone in fact, especially for heavy sleepers and kids. Sunrise simulation light with 7 natural sounds will be on gradually from 10% brightness to 100% by 30 minutes before alarm setting time. If you think 30 minutes is too long, you can set the process to 20 minutes or 10 minutes. Wake you up by nature.
• 7 Color Light & 20 Brightness Adjustable There are 7 color changing light you can choose, include blue, indigo, purple, red, orange, yellow, green. 3 level LED time display brightness & 20 level lighting brightness adjustable.

Product info

Wake up ligh & night lighteasy touch to change 10 color lights ,warm light is dimmable . besides, you can set only use the light to wake kids up in a pleasant way .features a nap timer to auto turn off. sun& moon teach me timeit's a fun and simple way for toddlers to answer their question, "is it time to get up?" icode uses colors and icon to teach your kids when it's time for bed and time to wake up. soft night light designed to help your kids feel safe when sleep in the dark! sleep sound machine add the rhythmic noises to your kids sleep routine to help them fall asleep faster and stay asleep longer. with icode clock, your kid can learn to stay in bed longer,so parents have more sleep How it worksmoon and sun icon will teach kids when it's time to sleep or wake up: set 2 separate alarms at sleep and wake up time. in the morning, it shows sun icon and green when it's ok for children to get out of bed! at night or nap time, the clock shows moon , so it's time to go bed and have sleep! note: sun/moon alarm and wake up light alarm are separate , you can set both or just one .

• WAKE UP LIGH & NIGHT LIGHTEasy touch to change 10 Color Lights ,warm light is dimmable . Besides, you can set only use the light to wake kids up in a pleasant way .Features a nap timer to auto turn off.
• SUN& MOON TEACH ME TIMEIt's a fun and simple way for toddlers to answer their question, "Is it time to get up?" Icode uses colors and icon to teach your kids when it's time for bed and time to wake up. Soft night light designed to help your kids feel safe when sleep in the dark! Sleep sound machine add the rhythmic noises to your kids sleep routine to help them fall asleep faster and stay asleep longer. With ICODE clock, your kid can learn to stay in bed longer,so parents have more sleep
• HOW IT WORKSMoon and sun icon will teach kids when it's time to sleep or wake up: set 2 separate alarms at sleep and wake up time. In the morning, it shows sun icon and green when it's OK for children to get out of bed! At night or nap time, the clock shows moon , so it's time to go bed and have sleep! NOTE: sun/moon alarm and wake up light alarm are separate , you can set both or just one .

Product info

Sound machine: select from a library of snooze-inducing sounds, lullabies, and white noise. expert recommended for babies, toddlers, and kids. Time-to-rise: set programs to cue your child for tricky transitions: naps, bedtime, and morning. the perfect kids alarm clock and toddler sleep trainer. Two-way audio monitor: check in without cluttering up your life. listen and talk to your child from another room through your phone with clear transmission. safe and secure to ensure your privacy, and audio communications never leave the confines of your home. no extra gadgets necessary. Night light: choose from a rainbow of colors to make it your own gentle and reassuring kids night light.

• Night Light: Choose from a rainbow of colors to make it your own gentle and reassuring kids night light.
• Sound Machine: Select from a library of snooze-inducing sounds, lullabies, and white noise. Expert recommended for babies, toddlers, and kids.
• Time-to-Rise: Set programs to cue your child for tricky transitions: naps, bedtime, and morning. The perfect kids alarm clock and toddler sleep trainer.
• Two-way Audio Monitor: Check in without cluttering up your life. Listen and talk to your child from another room through your phone with clear transmission. Safe and secure to ensure your privacy, and audio communications never leave the confines of your home. No extra gadgets necessary.

Product info

Sound machine with night lights this toddler alarm clock also features 4 sleep sounds (music box, lullaby, ocean wave, white noise) and 5 night light options (loop, red, blue, purple, yellow) to create a more soothing atmosphere for sleep. face expression and the lcd display are almost fully dimmable at night. Battery backup and child clock lock the kid alarm clocks build-in cr2032 battery preserves memory settings. the child lock mode help to prevents curious children from accidentally change the clock setting. Healthy sleep habits start early - our little teddi childrens trainer clock uses fun facial expression and soft colors to teach your kiddo when it is time to sleep and when it is okay to wake up (or almost wake with the option of enabling play mode before wake).

• Sound Machine with Night Lights This toddler alarm clock also features 4 sleep sounds (music box, lullaby, ocean wave, white noise) and 5 night light options (loop, red, blue, purple, yellow) to create a more soothing atmosphere for sleep. Face expression and the LCD display are almost fully dimmable at night.
• Healthy Sleep Habits Start Early - Our Little Teddi childrens trainer clock uses fun facial expression and soft colors to teach your kiddo when it is time to sleep and when it is Okay to wake up (or almost wake with the option of enabling play mode before wake).
• Battery Backup and Child Clock Lock The kid alarm clocks build-in CR2032 battery preserves memory settings. The child lock mode help to prevents curious children from accidentally change the clock setting.

Product info

Kids! never be late again waking up early is a daily struggle for most adults, let alone little kids! bring a stop having your mornings filled with screaming and shouting and gloomy groans. with our multi-functional kid's alarm clock that is specially designed to wake your precious kids gently for a fresh start to a new day (leaving us guilt free) this kids digital alarm clock is ideal for use of waking up, light or night light that the colour can be adjusted to match your mood Multiple functions with led display with a led display our smart digital alarm clock shows time in both 12 & 24hr formats, date, temperature (in fahrenheit & celsius), alarm setting and timing function. alarm clock for kids has 7 assorted coloured backlights making it visible in the dark and extremely useful as a nightlight. Kid-friendly and safe made with premium-quality abs material. our kid's alarm clock and night light is free from harmful chemicals, non-toxic substances, environment-friendly and ce/rohs/fcc certified to ensure complete safety for children. our kids alarm clocks operates on 3 aaa batteries (not included) and is extremely easy to use by children.

• KIDS! NEVER BE LATE AGAIN waking up early is a daily struggle for most adults, let alone little kids! Bring a stop having your mornings filled with screaming and shouting and gloomy groans. With our multi-functional kid's alarm clock that is specially designed to wake your precious kids gently for a fresh start to a new day (leaving us guilt free) This kids digital alarm clock is ideal for use of waking up, light or night light that the colour can be adjusted to match your mood
• KID-FRIENDLY AND SAFE Made with premium-quality ABS material. Our kid's alarm clock and night light is free from harmful chemicals, non-toxic substances, environment-friendly and CE/ROHS/FCC certified to ensure complete safety for children. Our kids alarm clocks operates on 3 AAA batteries (not included) and is extremely easy to use by children.
• MULTIPLE FUNCTIONS WITH LED DISPLAY With a LED display our smart digital alarm clock shows time in both 12 & 24hr formats, date, temperature (in Fahrenheit & Celsius), alarm setting and timing function. Alarm clock for kids has 7 assorted coloured backlights making it visible in the dark and extremely useful as a nightlight.

Product info

Attractive soothing with 7 colored optionssimply tap the large night light button to switch 7 colors in turn,perfectly as children's all night companion for bedroom without turning on lamp.while,the option to turn off night light is useful for someone who prefers total darkness. Adjustable wake up the heavey sleepers with loudest alarm volume equal to 80 db.buzzer sound is soothing instead of obnoxious harsing sounds.alarm starts slower and softer and then increases gradually until it reaches its maximum so you can wake up more gently. allow two devices cellphone or tablet pc to be charged at same time.simple connected with usb port before you go to bed,it will be fully charged when you wake up in the morning. Raised alarm pause button & bigger snooze button than averagebuttons are simple and intuitive for setup without annoying hold or repeat press.simply press the sticked up alarm pause button to turn off alarm by feel without opening eyes in the morning. biggersnoozebutton than average with light facility is added bonus,to get extra 9 minutes sleep you can pause alarm very quickly by pressing snooze button without opening eyes in the morning. - / package includes ac adapter to power on the clock,battery is required to memorize time and alarm setting in case of power failure,also it is able to triger an alarm without worrying getting up late even power outages and display goes black.

• Attractive Soothing with 7 Colored OptionsSimply tap the large NIGHT LIGHT button to switch 7 colors in turn,perfectly as children's all night companion for bedroom without turning on lamp.while,the option to turn off night light is useful for someone who prefers total darkness.
• - / Package includes AC adapter to power on the clock,battery is required to memorize time and alarm setting in case of power failure,also it is able to triger an alarm without worrying getting up late even power outages and display goes black.
• Adjustable wake up the heavey sleepers with loudest alarm volume equal to 80 DB.buzzer sound is soothing instead of obnoxious harsing sounds.alarm starts slower and softer and then increases gradually until it reaches its maximum so you can wake up more gently.
• Raised ALARM PAUSE button & Bigger SNOOZE button than averagebuttons are simple and intuitive for setup without annoying hold or repeat press.Simply press the sticked up ALARM PAUSE button to turn off alarm by feel without opening eyes in the morning. biggersnoozebutton than average with light facility is added bonus,to get extra 9 minutes sleep you can pause alarm very quickly by pressing SNOOZE button without opening eyes in the morning.
• Allow two devices cellphone or tablet pc to be charged at same time.simple connected with usb port before you go to bed,it will be fully charged when you wake up in the morning.

Product info

Wake up light if you don't like a sudden alarm sound in the morning, wake up light alarm will gradually wake kids up in a pleasant way ,light will stay on for 1 hour.features a sleep timer to silent countdown when kids fall asleep at night or nap time,then auto off .it's fun to touch the cat's foot to change 10 color lights or warm light . Encourage better sleep habits for your little oneit's a fun and simple way to tell kids when it's time to wake up and sleep,so parents get more sleep,no more early morning wake up calls! attractive color lights and soothing sounds are designed to help your kids sleep better and feel safe when sleep in the dark! wake up light function will wake kids up with nature-inspired sounds in a pleasant way. How it worksicode uses emoji and colors to teach your kids: in the morning, it shows wake up face (default)with green light when it's ok for children to get out of bed! at night ,it shows sleep face (default)with red ears, so it's time to stay in bed ! 30 minutes before wake up , it will show a ready to wake face.3 alarms for weekdays and weekend.

• WAKE UP LIGHT If you don't like a sudden alarm sound in the morning, wake up light alarm will gradually wake kids up in a pleasant way ,light will stay on for 1 hour.Features a sleep timer to silent countdown when kids fall asleep at night or nap time,then auto off .It's fun to touch the cat's foot to change 10 color lights or warm light .
• HOW IT WORKSIcode uses emoji and colors to teach your kids: In the morning, it shows wake up face (default)with green light when it's OK for children to get out of bed! At night ,it shows sleep face (default)with red ears, so it's time to stay in bed ! 30 minutes before wake up , it will show a ready to wake face.3 alarms for weekdays and weekend.
• ENCOURAGE BETTER SLEEP HABITS FOR YOUR LITTLE ONEIt's a fun and simple way to tell kids when it's time to wake up and sleep,so parents get more sleep,no more early morning wake up calls! Attractive color lights and soothing sounds are designed to help your kids sleep better and feel safe when sleep in the dark! wake up light function will wake kids up with nature-inspired sounds in a pleasant way.

Product info

Set it and forget it! saves your sleep/wake settings for the following day! very simple to operate and set. and it will save your settings for the next day! no trying to remember to set the clock every night. includes a lock feature to prevent your child from changing any sleep/wake settings Quiet clock with no alarm to wake your child: clock operates silently and allows your child to rest. there is not an alarm that will sound, designed as a sleep trainer to help your child sleep and keep them in bed. the sharp ready to wake sleep trainer is ac powered, but can be used for short periods of time unplugged with the battery back-up feature (requires 3 aaa batteries, not included) Animated and color-coded display to teach child when it is ok to get out of bed: when the unicorn is pink (and has its eyes closed) it signals that your child should stay in bed. when the face turns green (and its eyes open) it is time to get up! teach your kid to go to bed. you can also set the unicorn to light up pink at a specified bedtime, so they know it is time for bed. removes the arguing for 5 more minutes when the light goes off, its time for bed. no more arguing! Nightlight projector with 15, 30, 45, 60, or 90-minute timer: high quality projector that illuminates a stars, hearts, and rainbow scene on the ceiling! projector can be set to illuminate for 15, 30, 45, 60 or 90 minutes, and then quietly shut off.

• Set it and Forget it! Saves your Sleep/Wake settings for the following day! Very simple to operate and set. AND it will save your settings for the next day! No trying to remember to set the clock every night. Includes a lock feature to prevent your child from changing any Sleep/Wake settings
• Quiet clock with No Alarm to Wake Your Child: Clock operates silently and allows your child to rest. There is not an alarm that will sound, designed as a sleep trainer to help your child sleep and keep them in bed. The Sharp Ready to Wake Sleep Trainer is AC powered, but can be used for short periods of time unplugged with the battery back-up feature (Requires 3 AAA batteries, not included)
• Nightlight Projector with 15, 30, 45, 60, or 90-Minute Timer: High quality projector that illuminates a Stars, Hearts, and Rainbow scene on the ceiling! Projector can be set to illuminate for 15, 30, 45, 60 or 90 minutes, and then quietly shut off.
• Animated and Color-Coded Display to Teach Child when it is OK to Get Out of Bed: When the Unicorn is Pink (and has its eyes closed) it signals that your child should stay in bed. When the face turns green (and its eyes open) it is time to get up! Teach your kid to go to bed. You can also set the Unicorn to light up pink at a specified bedtime, so they know it is time for bed. Removes the arguing for 5 more minutes When the light goes off, its time for bed. No more arguing!

Product info

Led displaydelicated led display screen shows time, date, weekday and temperature. say no to "mom, what date is it today?" Battery operated- this clock is operated by aaa batteries. batteries are not included. 8 ringing tones optionsprovide 8 different ringing tones, include 5 children folk rhymes and other 3 different beep-beep volume alarm sounds. it will be a good companion to your little ones when they learn to sleep alone. 7 color night lightmulti-color night lights can be used as mood light or screen backlight to clearly see the time at night. it's a good for kids sleeping traning, to teach kids when it's time for bed and wake up.

• 7 Color Night LightMulti-color night lights can be used as mood light or screen backlight to clearly see the time at night. It's a good for kids sleeping traning, to teach kids when it's time for bed and wake up.
• Battery Operated- This clock is operated by AAA batteries. Batteries are NOT included.
• 8 Ringing Tones OptionsProvide 8 different ringing tones, include 5 children folk rhymes and other 3 different beep-beep volume alarm sounds. It will be a good companion to your little ones when they learn to sleep alone.
• LED DisplayDelicated LED display screen shows time, date, weekday and temperature. Say no to "Mom, what date is it today?"

Product info

Led displaydelicated led display screen shows time, date, weekday and temperature. say no to "mom, what date is it today?" 8 ringing tones optionsprovide 8 different ringing tones, include 5 children folk rhymes and other 3 different beep-beep volume alarm sounds. it will be a good companion to your little ones when they learn to sleep alone. 7 color night lightmulti-color night lights can be used as mood light or screen backlight to clearly see the time at night. it's a good for kids sleeping traning, to teach kids when it's time for bed and wake up. Battery operated- this clock is operated by aaa batteries. batteries are not included.

• Battery Operated- This clock is operated by AAA batteries. Batteries are NOT included.
• LED DisplayDelicated LED display screen shows time, date, weekday and temperature. Say no to "Mom, what date is it today?"
• 8 Ringing Tones OptionsProvide 8 different ringing tones, include 5 children folk rhymes and other 3 different beep-beep volume alarm sounds. It will be a good companion to your little ones when they learn to sleep alone.
• 7 Color Night LightMulti-color night lights can be used as mood light or screen backlight to clearly see the time at night. It's a good for kids sleeping traning, to teach kids when it's time for bed and wake up.

Product info

Upgraded materialthis clock is made of food-grade plastic, you can enjoy a peace of mind while for children using. led display of old version is very hard to see the screen numbers from the left and right angel. we updated the screen glass with good quality and high-tech, now you can see the alarm clock at any angel! 7 color night lightmulti-color night lights can be used as mood light or screen backlight to clearly see the time at night. it's a good for kids sleeping training, to teach kids when it's time for bed and wake up Updated built-in 600ma lithium batterydayoo alarm clock has a 600 ma battery with a usb charging. which can be used for three months in one charge. you don't have to worry about going to the store to buy batteries every week, low carbon life Stylish design for dcor this must be the most delicate alarm clock you've ever seen. it's not only a clock, but also a great decoration for your bedroom. stylish appearance and multiple functions make it suitable as a gifts for kids

• Upgraded MaterialThis clock is made of food-grade plastic, you can enjoy a peace of mind while for children using.
• Updated Built-in 600mA Lithium BatteryDAYOO alarm clock has a 600 mA battery with a USB charging. Which can be used for three months in one charge. You don't have to worry about going to the store to buy batteries every week, low carbon life
• 7 Color Night LightMulti-color night lights can be used as mood light or screen backlight to clearly see the time at night. It's a good for kids sleeping training, to teach kids when it's time for bed and wake up
• Upgraded MaterialThis clock is made of food-grade plastic, you can enjoy a peace of mind while for children using. LED Display of old version is very hard to see the screen numbers from the left and right angel. We updated the screen glass with good quality and high-tech, Now you can see the alarm clock at any angel!
• Stylish Design for Dcor This must be the most delicate alarm clock you've ever seen. It's not only a clock, but also a great decoration for your bedroom. Stylish appearance and multiple functions make it suitable as a gifts for kids

Product info

Stylish design for dcor this must be the most delicate alarm clock you've ever seen. it's not only a clock, but also a great decoration for your bedroom. stylish appearance and multiple functions make it suitable as a gifts for kids Upgraded materialthis clock is made of food-grade plastic, you can enjoy a peace of mind while for children using. led display of old version is very hard to see the screen numbers from the left and right angel. we updated the screen glass with good quality and high-tech, now you can see the alarm clock at any angel 7 color night lightmulti-color night lights can be used as mood light or screen backlight to clearly see the time at night. it's a good for kids sleeping training, to teach kids when it's time for bed and wake up Updated built-in 600mah lithium batteryoutwit alarm clock has a 600 mah battery with a usb charging. which can be used for 1-2 months in one charge. you don't have to worry about going to the store to buy batteries every week, low carbon life

• Upgraded MaterialThis clock is made of food-grade plastic, you can enjoy a peace of mind while for children using.
• 7 Color Night LightMulti-color night lights can be used as mood light or screen backlight to clearly see the time at night. It's a good for kids sleeping training, to teach kids when it's time for bed and wake up
• Upgraded MaterialThis clock is made of food-grade plastic, you can enjoy a peace of mind while for children using.
• Stylish Design for Dcor This must be the most delicate alarm clock you've ever seen. It's not only a clock, but also a great decoration for your bedroom. Stylish appearance and multiple functions make it suitable as a gifts for kids
• Upgraded MaterialThis clock is made of food-grade plastic, you can enjoy a peace of mind while for children using. LED Display of old version is very hard to see the screen numbers from the left and right angel. We updated the screen glass with good quality and high-tech, Now you can see the alarm clock at any angel

Product info

Warm tips for using - this kids alarm clock needs 2x ag13 batteries(included) for clock lcd display, and 4x aaa batteries(not included) or the included charging cable for led lights up. pls remember to remove the isolation film between the two button cells, otherwise the clock cannot work.

• WARM TIPS FOR USING - This kids alarm clock needs 2x AG13 Batteries(included) for clock LCD display, and 4x AAA batteries(not included) or the included charging cable for LED lights up. Pls remember to remove the isolation film between the two button cells, otherwise the clock cannot work.

Product info

How do i installyou gotta put both 2x ag13 batteries(included) and 4x aaa batteries(not included) to make lcd displays and led lights work.if the clock powered by charger cable, then you don't need 4 x aaa batteries. Led displaydelicated led display screen shows time, date, weekday and temperature. in addition, this digital alarm clock can also change the time format of 12-hour and 24-hour systems. 7 color night light & 8 ringing tones options: multi-color night lights can be used as mood light to smooth your kid's emotion. simply tap the on button to turn on the automatic 7 color night light function. additionally 8 different ringing tones are also provided to match your mood. Direction for use tap set to activate setting of time and date. tap al+up to activate/stop alarm clock & snooze. tap al+set to activate general setting of alarm clock, snooze and ringing tones.tap on/off to set night light. tap up to switch 12h or 24h time format. tap down for the conversion of celsius and fahrenbeit temperature.

• Direction For Use Tap SET to activate setting of time and date. Tap AL+UP to activate/stop alarm clock & snooze. Tap AL+SET to activate general setting of alarm clock, snooze and ringing tones.Tap ON/OFF to set night light. Tap UP to switch 12H or 24H time format. Tap Down for the conversion of Celsius and Fahrenbeit temperature.
• 7 Color Night Light & 8 Ringing Tones Options: Multi-color night lights can be used as mood light to smooth your kid's emotion. Simply tap the ON button to turn on the automatic 7 color night light function. Additionally 8 different ringing tones are also provided to match your mood.
• How Do I InstallYou gotta put both 2x AG13 Batteries(included) and 4x AAA batteries(not included) to make LCD displays and LED lights work.If the clock powered by charger cable, then you don't need 4 x AAA batteries.
• LED DisplayDelicated LED display screen shows time, date, weekday and temperature. In addition, this digital alarm clock can also change the time format of 12-hour and 24-hour systems.