Changes from week to week due to my 8 day shift pattern of two days, two 14hr nights, four off clashing with my other half's 10 week day or late shift pattern and having a 4yo in school.
I just make sure each week that I plan which day I'm going to do what and then go by feel as to what time will be best to get it done on that day. Not a life for those that need a regimented routine in this house!