Counting five days
22 December, 2002
I got my period on Monday night. Can I count Monday as day one of the five days, or must I start with Tuesday?
When we count the five days (and the seven days), we go according to the Jewish calendar. Thus, anything after sunset is considered the next day. You began to menstruate Monday night, which halachically is Tuesday. Therefore, Tuesday is called day one and you cannot do a hefsek taharah until Shabbat afternoon.
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