I have to wear a watch which displays the days of the week (Sat-Fri);
Your Monday is my Saturday. The Afghan Friday is our (CONUS folks) Sunday. However, some CONUS folks which are OCONUS still, observe Sunday CONUS or OCONUS thus, some offices are closed on Sunday and/or Friday depending on who's in command and whom 'Sunday', we're observing.
BLUF:
Monday-Thursday is the best time too get work done IF, you can remember those days!
I know this may sound like it doesn't make sense. However, trying to explain a "typical" workday in SF is what I just tried to do.
Stay safe.