Original Message

Sounds like you are not on a regurlarly assigned duty schedule if you go from days to night in the middle of your "hitch" each week.

https://www.faa.gov/about/office_org/headquarters_offices/agc/practice_areas/regulations/interpretations/Data/interps/2013/New_2013_Legal_Interpretation.pdf

And, it makes perfect sense, if you understood why FAR 135.267(c) was even instituted.