The 14th and 15th of Adar: Megillah 5b
The 28th of Adar, for the victory of Yehudah ben Shamua and his peers, in convincing the king to repeal a decree forbidding learning of Torah, circumcision, and keeping of Shabbat: Rosh HaShanah 19a
First 8 days of Nisan, for the victory of the Sages over the Sadducees regarding the Daily Offering: Menachot 65a
From the 9th of Nisan until after Pesach, for the victory of the Sages over the Boethusians regarding the timing of Shavu'os [Pentecost]: Menachot 65a