This is a late post, but I wanted to put it up for future reference. 1 (Kalends): Games of Flora continue; sacrifice to Maia; anniversary of the Temple of Bona Dea on the Aventine 9, 11, 13: Lemuria, a festival of the dead with both public and household rites, possibly with a sacrifice to Mania on the 11th 14: anniversary of the Temple of Mars Invictus 15 (Ides): Mercuralia, in honor of Mercury 21: one of four Agonalia 23: a second Tubilustrium 25: anniversary of the Temple of Fortuna Primigenia