Related על מגילה 2:5

All of the day of the waving (i.e., the first day of the Omer, see Sukk. 3:12), it is forbidden to eat new grain. All of the seventh day [of Sukkot] one is obligated in sukkah, and all of the seventh day [of Sukkot] is valid for [waving] the lulav. All of the eighth day [after birth] is valid for circumcision. All of the night is valid for the reaping of the omer and for the burning of limbs and fat [leftover from the day's sacrifices]. The general principle is that anything commanded during the day is valid all day and anything commanded at night is valid all night. One is not liable for notar [leaving part of the shelamim sacrifice over] and the intention [at the time of the sacrifice to eat the shelamim sacrifice later] does not invalidate as pigul until dawn.