dvadasi
dvādaśī-vratam — the vow for observing Ekādaśī and Dvādaśī; SB 9.4.29
utthāna-dvādaśī-yātrā — the festival of Utthāna-dvādaśī; CC Madhya 15.36
vāmana-dvādaśī — the birthday or appearance day of Lord Vāmana; CC Madhya 24.341