Git commits do embed a timezone in the commit timestamp. And while lunchtime will vary by person, there may still be a visible effect around common lunchtimes over a large number of people.

Time is an illusion; lunchtime, doubly so.

The hypothesis I would personally register is that bugs increase after 5:30 PM, and that this effect drops off in late evening hours.

Basically, that compelling one's employees to stay late is an anti-pattern, where one loses more than one gains.

I read this as 'pita' as in 'pita bread'. A clever reference to lunch time if that was the intention? Culturally different too as we don't often eat pita for lunch here, but I imagine it's common elsewhere.