Pesachim 71: How We Rejoice

Does a korban brought in rejoicing (shlamei simcha) have to be at the time of the holiday? Of course, it's a machloket, with a key implication with regard to what should happen on Shabbat. Also, how the chagigah differs when offered on Erev Pesach. And: another very long mishnah... this time, the halakhic discussion on the lack of intent or purpose for the Korban Pesach when it is slaughtered on Shabbat (as compared to previous such discussions, which were about the korban itself, and whether it qualified as a Korban Pesach). The implications for violating Shabbat in slaughtering various cases that don't go the distance as the Korban Pesach.