Remember a few years ago (maybe a lot!) that we concluded, since lots of accidents happened on Fridays, we would cease flying at lunchtime and do ground training in the afternoon. Ginger beers could fettle jets for Monday and we could stack to the bar in good time for H-Hour having filled a few squares that would never have got filled otherwise.
Worked for us - maybe it's still working - or maybe now they get to the pub at lunchtime!