A.,
I had a similar issue with my son, now 7, and our daughter is 3. I learned the first time around that letting them stay up later is not really in their best interest. Kindergarten starts promply at 8:00am. If you think about it, you have to be up at 6:30, to get dressed have breakfast, brush teeth, comb hair (with little hair clips that match her outfit). Not to mention if you go to work getting yourself ready as well. Children need 10 to 12 hours of sleep at night, and the three year old still takes a nap on top of that sleep time. Starting a strict bed time routine helps too. Eating dinner at the same time every night, taking a walk around the block or bike ride (or playing a game if it's raining), bath, brush teeth, read a story and lights out. Even if she doesn't fall right asleep at 8, having that quiet time alone in her room is restfull for her.
And, yes, there are days when the kids don't see dad. When dad is able to spend time with kids...make it "their" time only. Getting one on one time with daddy is special especially for little girls. Also, try to see if there are peticular days he could drop her off at school. Or even better, eat breakfast together at school. Brevard county schools offer free breakfast for ALL Students. Adult breakfast is like $1.40 or something like that.
Remember, its not the amount of time dad's spend with their kids, it's the quality.
All will work out, have faith.