Hi Linda
I work days and nights 12 hour shifts but just finished my last shift at 6am this morning,I am 2 days off the big O and i am on the milk and yoghurt diet.
I tended to find i was more hungry after 11pm,so i would save the majority of my allowance for after that time,it was difficult working days when ppl around me were all eating "normal"food but the more days you get into the diet the easier it gets.Honestly.
Like many have advised drink plenty of water helps fill you up.
Good luck ,I am sure you will be fine .