Or maybe typically apropos. Depends on how you look at it.
Anyway. If one just happens to count five weeks on the calendar rather than the more correct four weeks, one will find oneself woefully unprepared for the regular monthly visitor.
Many thanks to whatever social motivation puts sanitary dispensers in womens' restrooms.
(We won't go into just how long I managed to keep telling myself 'no, it's not for another week' against all signs to the contrary. I even wondered what the heck was wrong with me... until I rechecked the calendar.)