I'm a midwife and do more nights than days, I actually find I lose weight more when I'm on a week of nights! Here's my usual routine:
Day of 1st night - go to the gym in the morning, have a light lunch, have a snooze in the afternoon, have a normal SW dinner, go to work.
During the night I have a 'meal' about 2am ish, either some soup or a pasta salad. And then about 6am have either fruit and yoghurt, or some cereal for breakfast. I don't eat anything when I get home, just go straight to bed.
Wake up about 5pm ish, have a normal, filling SW tea, and go to work again.
I used to struggle so much on weight watchers trying to stretch my points, particularly on my last night when your up all night and most of the next day too, but SW is great, if your hungry then eat, just make sure it's free. Always have a constant supply of fruit and an emergency mugshot in my bag, so that if I'm at work and starving, I can have a free snack to keep me going. And in terms of healthy extras and syns, I go from midnight to midnight. It does get easier, and your body does adjust!