DD has not yet fully dropped it, but will generally go without a day sleep 2 or 3 days a week, however I do try to enforce some 'quiet time' every day even if she doesn't sleep. She has to go to her room and play or read quietly for at least an hour. Sometimes she just puts herself to bed and just dozes off.

I find that that down time is enough that come dinner time she's not cranky and is still generally agreeable.

She goes to bed at night at 7:30pm and generally wakes at 7:30am, but if she didn't sleep during the day, she may not get up until about 8:00am.