Popular Posts

Resource Topics


SPRING 2021: Daylight Saving Time Transition for Babies

Remember when you were younger....maybe high school or college? And you really disliked the "Spring Ahead" time change because it meant you had to wake up an hour earlier in order to get to work or class on time? You'll still feel the same as a parent, but ironically, it is this particular time change that can help resolve persistent early waking in your baby. It's also the time change that can lead to bedtime battles, split nights, and some pretty overtired babies in the evening, too, so be sure you read this post carefully. By following a few easy steps, you and your baby will make it through this just fine!

***This is the first in a series of blogs that will help you prep for daylight savings. This post focuses on how to help babies adjust. We have separate posts on how to help your toddler adjust and on how to use the daylight savings transition to maintain a later wake time.

The Science of the Problem

An hour shift seems so insignificant; how could it have the potential to cause so much trouble? The answer is that this transition involves the loss of an hour of sleep, but it also causes circadian rhythm disruption that can persist for several days after the clocks change. Without proper preparation, this can lead to adults feeling un-rested for a few days after the transition and it can lead to an unraveling of good habits in babies.

The problem boils down to this: The circadian rhythm strongly promotes wakefulness right before bed, promotes sleep at a regular time each evening, and promotes waking at a regular time each morning. We'll say that first part again: the strongest drive to be awake is at the end of the day right before your baby normally goes to bed.

Under normal circumstances this is a good thing—it allows for a regular bedtime even on days when napping is a little screwy. If humans didn’t have this promotion of sleep happening at night bookended by drives to be awake, then sleep would be fragmented instead of happening in a consolidated bout of overnight sleep.

Light exposure is what keeps the circadian rhythm locked into this routine and it’s only through altering light exposure that you can truly reset the circadian rhythm.

So, when daylight savings happens it is the same as what happens with jet-lag (the clocks change), but without the benefit of a change in lighting that would come with traveling across time zones.

The figure below illustrates the problem (the shaded gray bar represents sleep).

So here’s what that means...

If you do nothing to facilitate the change and you put your baby to bed at the usual time on the night after the clocks reset, then you will be putting your baby down an hour earlier than his body is ready to go to sleep, at a time when wakefulness is being strongly promoted.

The obvious problem here is that your baby will have a really difficult time falling asleep at that earlier time. He will probably try to sleep, because your routine is cuing him for sleep, but his body will be telling him to stay awake. As illustrated in the figure above, you may find that sleep “doesn’t stick,” with lots of pop-ups within the first hour after putting him down. Or, you may experience lots of crying, frustration, night wakings, and perhaps see some unwanted behaviors like climbing.

Fast forward to the morning and the circadian rhythm will continue to promote sleep until his former wake time (which will be an hour later by the clock), unless you wake him up. If you kept this routine up then eventually your baby would adjust, but it can be deceptively difficult to wing it.

Basically, you will be asking your baby to sleep at a time when his body is not ready for sleep. Often, this ‘forcing’ of sleep leads to crying, crib aversion, and subsequent night wakings, so it’s worth it to proactively adjust your baby, so that he doesn’t spend any time unnecessarily frustrated at bedtime.

*This time change can also lead to babies developing a “split night” due to having an extra hour in bed at night.

The DST Adjustment Plan

Control your baby’s exposure to light and darkness

  • If you want to keep your baby’s bedtime ‘by the clock,’ then darken your house an hour before bedtime starting at least four days prior to the time change. Exposure to light before bed will prevent your baby from being able to go to sleep earlier. For example: if your baby typically goes to bed at 8pm, then several days before DST, at 7pm turn off all of your bright lights, close your curtains, and use only a few nightlights for safety to move around your house. You and your baby can lie and play on the floor, do some tummy time, play with some sensory toys, talk and sing or listen to music, drink milk, etc. You will still get your baby ready for bed at the usual time and tuck him/her in at the usual time. You will just be doing these typical steps in very low lighting—as low as you can and still be safe.

  • Although we ‘spring ahead,’ this transition is really like putting your baby to bed an hour earlier, because 6:00 PM becomes 7:00 PM after the time change.

  • You don’t have to worry much about light exposure in the morning for this transition, because 5:00 AM will become 6:00 AM. As long as you are not flipping on the lights unusually early, everything should be fine in the morning—just keep it dark until your baby’s target wake time.

Gradually adjust bedtime

  • If your baby is over 6 months old, then move bedtime earlier in 10-15 minute increments each night leading up to the transition beginning after the first evening of early darkness as described above.

  • If your baby is between 3-6 months old, then it’s better to take two days for each 15 minute shift. For example, if you are moving bedtime from 8:00 PM to 7:00 PM, then day 1 move bedtime to 7:45, day 2 keep bedtime 7:45, day 3 move bedtime to 7:30, day 4 keep bedtime at 7:30, day 5 move bedtime to 7:15, day 6 keep bedtime at 7:15, day 7 move bedtime to 7:00 and keep it there and 7:00 will become 8:00 again after the time change.

  • If your baby is under 3 months, then you probably don't need to do much because your baby's circadian rhythm is not likely mature yet. You can wake your baby around the same time in the morning each day, but you should not try to force your baby to stay awake for long stretches to maintain a schedule.

If needed, adjust wake time.

  • I know, I know. Why would you want to wake your baby in the morning? The great thing about this transition is that 5:00 AM becomes 6:00 AM and you don’t have to do a thing but change the clock to make that happen. Unfortunately you may need to wake your baby in the morning in order to maintain an appropriate duration of sleep at night. For example, if your baby normally sleeps from 7:00 PM to 6:00 AM and only needs 11 hours of sleep at night (which is a perfectly normal duration) and you want to keep bedtime at 7:00 PM, then you’ll need to wake your baby up 15 minutes earlier each morning when you are shifting bedtime in order to avoid having your baby spend a stretch of time awake in the middle of the night from spending too long in bed. Please read that sentence again - it's super important!

  • By waking your baby a little earlier each morning, you’ll also be giving him extra morning light exposure, which will also help him shift faster at bedtime.

Gradually adjust naps

  • Naps are driven by sleep pressure, not by the circadian rhythm, so you have much more flexibility when it comes to when your baby naps during the daylight savings time transition.

  • If your baby is over 6 months old or if your baby has a predictable nap pattern, then the easiest way to make the shift happen is to move naps incrementally earlier at the same pace that you move bedtime earlier.

  • If your baby is younger than 6 months old and doesn’t yet have a predictable nap pattern, then the only time to consider a nap change is for the last nap of the day. If you are putting your baby to bed incrementally earlier each night you don’t want a late nap interfering with your baby’s ability to fall asleep at the earlier bedtime. In this case consider waking your baby up from the last nap of the day in order to ensure that there is at least two hours of awake time between the end of the nap and your baby’s target bedtime for that night.

Wrapping Up

The steps above will work to help adjust sleep for babies who currently have a stable bedtime and wake time and who are generally getting enough sleep at night. The above recommendations also assume that you want to keep your baby’s sleep pattern as it is now. If your child’s pattern is not what you would like it to be or if your baby isn’t currently getting enough sleep at night, then check out our sleep class. We cover sleep basics, including how to set schedules, adjust night feeding, optimize the sleep environment, and offer strategies for how to teach your baby to fall asleep independently. If you feel you need personalized support, then feel free to book a one-on-one consultation with us. We are happy to help!


"Practice parameters for behavioral treatment of bedtime problems and night wakings in infants and young children." Sleep 29, no. 10 (2006): 1277-1281.

Honaker, Sarah Morsbach, and Lisa J. Meltzer. "Bedtime problems and night wakings in young children: an update of the evidence." Paediatric respiratory reviews 15, no. 4 (2014): 333-339.