Hi all,
I know if baby doesn't sleep, it can be hard for parents!
As sb1201 said, if your son sleeps through the night at 5pm till the next morning, it may be just his schedule. If not, I would definitely change it! When my elder daughter was 3-month old, I read this
book to start her sleep training and it works really well! And now, my elder daughter is 28-month and she is still having one nap, between 2 to 3 hours. My little one is 5-month and I use the same method and it works quite well too.
Sometimes my elder one won't sleep after an hour or so I put her down and recently I found out that she may be overtired. The book mentions that if baby is overtired, they cannot fall asleep easily. Just like us, adults, if we are too tired, it takes a long time to fall asleep. So I have tried to put her to bed earlier (before 12:30pm) and for these few days, she seems falling asleep within 15 minutes.
What time does your son get up in the morning? Try to give him some exercise in the morning. Sometimes I think mentally exercise (i.e. reading books, flash card, YBCR, Tweedlewink, etc) uses up even more energy! And routine is very important! My daughter usually goes to nap after lunch and she seems doing fine! But during weekend, it may be different because she has some class in the morning and that postpones her nap time.
Hope it helps