KW: For smaller babies, you want to just make sure they're really well-napped (anyway you can get them) so that you can perhaps try to move bedtime a little bit later. For a baby who's say 5-6 months and older, who is napping two or maybe three times a day, I would want to have the parents ideally four to five days prior, start to move naps, meals, and bedtime later in 10-15-minute increments. We're talking small increments because they're younger and it's easier to get them overtired, which will make bedtime harder for night wakings and so forth.
For older toddlers and preschoolers, especially the ones who are already well-rested, they may be able to move their bedtimes later in either one soft swoop or [over the course of] two days, like half an hour later Friday night and half an hour later Saturday night.
At the very least, you're going to want to make sure that on Saturday, your child is very well-napped so that ideally they can get to a slightly later bedtime on Saturday night, and then on Sunday.
The clock will say 6 a.m., but our bodies will think it's 5 a.m. So, we want to adjust to the new time on Saturday, which will help everyone. It may mean that they need a bonus nap on Sunday to make it to the new, later bedtime on Sunday night. Remember, overtired, poorly napped babies are more likely to wake up early, and it's really important that their "daytime sleep tank," as I like to call it, is full.
