My routine for almost every fast day:
I go to sleep “very early” the night (or day) before and then work at night. Eat a late Lunch/snack at supper then a regular supper at breakfast time. After Shachris, go to sleep. wake up at noon’ish and get a late start at work. Depending on the fast, especially tomorrow, by the time you get home you its mincha time…then your ready for lunch 🙂 Have an easy fast!