And while any of the books can help you get your baby sleeping better, even though they all use different methods, it is important to notice that most of these parenting experts stress the key of a good bedtime routine for a good night's sleep.
https://www.verywell.com/kids-and-bedtime-routines-2634260
1 A good bedtime routine will probably last about 10 to 15 minutes, or a little longer if you include a bath.  Do use a security object as a part of your bedtime routine. A security object, like a stuffed animal or blanket, can be an important part of a good bedtime routine, especially for toddlers and preschoolers.
https://www.verywell.com/kids-and-bedtime-routines-2634260
Other things that you should likely do as part of a good bedtime routine can include that you: Do start early. It is much easier to begin a good bedtime routine when your baby is young than to try and change poor sleep routines when you have a toddler or preschooler who still isn't sleeping well.
https://www.verywell.com/kids-and-bedtime-routines-2634260
MINNEAPOLIS (WCCO) — This time of year, we think a lot about putting our kids to sleep on time, but what about the adults? Do they have an ideal bedtime? “The best bedtime is different for every person,” said Dr. Michael Howell, a sleep specialist with the University of Minnesota. “But all of us do have an ideal bed time in which we fall asleep as well as to wake up.”. Howell says the best way to figure out your natural bed time to wake up naturally, without an alarm clock or kids, and subtract eight hours if you’re an adult, nine hours for teenagers and ten hours for children.
http://minnesota.cbslocal.com/2014/08/28/good-question-do-adults-have-an-ideal-bedtime/
The awake time between the last nap of the day and bedtime is the most sensitive. What I mean by this is that if we are putting baby down too late, stretching baby out too long, it is a recipe for nightwakings, a restless sleep, and an early morning wake-up.
http://www.weebeedreaming.com/my-blog/ideal-bedtime
1 It is much easier to begin a good bedtime routine when your baby is young than to try and change poor sleep routines when you have a toddler or preschooler who still isn't sleeping well.  Do make your bedtime routine age-appropriate. Your child's bedtime routine will change over time. For example, while it is expected for a newborn or younger infant to fall asleep nursing or drinking a bottle of formula, you can try and start putting your baby down while he is drowsy but still awake once he is four or five months old.
https://www.verywell.com/kids-and-bedtime-routines-2634260
There is not one ideal bedtime for each child, because sleep needs, lifestyles, and napping patterns can vary considerably. However, you can look at the typical sleep requirements for various age groups and use it as a guide.
http://www.webmd.com/sleep-disorders/features/guidelines-for-your-childs-bedtime
Most adults fall asleep between 10 p.m. and midnight, but 1/3 of people wait until after midnight to hit the sack. “I usually watch Criminal Minds before I go to bed,” said Anna Hickey of Minneapolis. Howell recommends eight hours for adults and says starting sleep at 10 p.m. is better than at 2 a.m.
http://minnesota.cbslocal.com/2014/08/28/good-question-do-adults-have-an-ideal-bedtime/
It may also prevent future sleep problems. Good sleep habits can not only take the stress out of bedtime, but can help make it the special time it should be for you and your child. There are no hard-and-fast rules for sleep behavior, and as always, there is individual variation. Your child is unique. If your routine is working, then it is probably best for you.
http://www.webmd.com/sleep-disorders/features/guidelines-for-your-childs-bedtime
Bedtime in newborns is naturally late, usually around 9:00pm or later, but it is important to start moving the bedtime earlier around 6/8 weeks. By 2 months, baby's bedtime should be between 6:00-8:00pm and should occur about 1 hour after the last nap ends.
http://www.weebeedreaming.com/my-blog/ideal-bedtime
what time is bedtime?
2 months, baby's bedtime should be between 6:00-8:00pm and should occur about 1 hour after the last nap ends. A 2 months, baby's bedtime should be between 6:00 and 8:00 pm and should occur about 1 hour after the last nap ends. Bedtime is around 9:00 pm or later. Around 9:00 post meridian or later is a bed time.