I carry when ever and where ever legal to do so.
Bad things happen to good people, in good perceived safe places when least expected.
As Frank stated ,
I'm not clairvoyant. I have no way to know if today is more likely to be my unlucky day than any other day.
My opinion is, either carry as I stated I do, or don't bother at all. Part time carry does not work, and again what/which part time carry should I choose?
AM, PM, odd days, even days. Carry on the days that have the partial word "DAY" in them.