Originally Posted by Cat Herder:
I give notices on Fridays to give them the weekend to get what is needed.
I try to do this, too, for the same reason. Sometimes I have to give short notice because I didn't notice supplies were running low but I've never caught any flack for it. Usually parents stock up. (I used to keep a spare pack of diapers and wipes in my car trunk when my oldest was in day care.)