How much time is needed before or after shabbos to say it is "שכר שבת בהבלעה" (shabbos earnings included with weekday earnings).
Is One Allowed to Rinse Off the Dishes if They Know They Will Attract Bugs or Start to Smell?;
דבר דבר (Dabair Davar): Making Calculations on Events Which Already Took Place Before Shabbos;