My son will be two in June. Some days, he takes a nap. On those days, he ends up not going to bed till after ten o'clock at night. On the days he doesn't have a nap, he goes to bed early. Him taking a nap usually depends on what time he gets up in the morning. I let him wake up when he wants to wake up...usually anywhere from nine to eleven o'clock in the morning.
When I took him with me babysitting, he would get up at around six thirty and then be asleep again by nine and then up at twelve in the afternoon. I think it's harder getting him down for a nap is because i have stopped nursing him to sleep. I did nurse him to sleep today though...mainly because I needed a nap as well.
Is it okay to let him not have a nap even though he isn't even two yet? I don't force him to stay up. If I don't actively try and put him down for a nap by rocking or nursing, he doesn't take one. And no, he does not get many sweets. I limit his sweets because they make him hyper. He make get chocolate/junk about once or twice a week...if even that.