I am a hospice nurse and worked overnights during my major weight watchers "losing" time. (I would like to take about five more pounds off, but am at my goal). Anyway, I would just count my first meal of the day as "breakfast" then so on. It got a little screwy, but then again, at that time I was tracking with paper as opposed to online so it made it easier for me. I would consider AFTER my big sleep to be a new "day" and then start my day when I woke up (even on my "off work" days when I was on normal daylight hours.). So on an off day, my breakfast was at like 8 am. On a work day, breakfast was more like 4 PM. Does that make sense?