I want to bolster the reply you already got. Regularity Is everything for little ones, and it was hard for us to get in a good rhythm with sleep. My wife lead the charge ( as she was the one our LO wanted at night, even after being well fed before bed ) and read a lot of material on sleep patterns. She started a routine of dinner - bath - reading - bed, with a target of 7:15 for bed. the first two nights were hard. building the pattern means sticking to your guns, making sure he -really does- have everything he needs, getting him tired and then not getting him out of the crib. Having your kid wailing in the next room is the worst thing in the world, but knowing that you're working on something that will help everyone is the only reason to let him "cry to sleep." We did 5 - 10 - 15 minute interval checks to soothe him, remind him we were still there, build confidence and independence, and on day two he "got it" and went to sleep after the second check. Now he's down within 30 minutes of 7:15 and sleeps really well. He still gets up in the middle of the night, and being sick or cold throw it all off, but he gets back on track. He's 16 months now and has been sleeping well for four months. Its a life changer. I hope you get some sleep.

Yes it's absolutely possible. At age 2 my son gets one nap and goes to bed at 7pm (after dark). Use the circadian rhythm to your advantage.