Not to mention, on top of that, periods aren't neat 24hr affairs anyhow. Could be a week-long range.
I suspect it's still important to have some idea when to start wearing pads/tampons, though.
Oh, Admiral!
I'm just writing up my schedule.Well damn, you've just got no delicacy in you...What's this? Whacking some stickers for what kinda day it is?
How cute!Curry Day!What? Why?What happens on this once-a-month strawberry day?What'cha up to?You're the worst!Going on a trip with Oboro-chanHuh!?