dvadasyam

dvādaśyām — on the day after Ekādaśī; SB 4.12.49-50
dvādaśyām śravaṇeṣu — on the twelfth lunar day and in the nakṣatra named Śravaṇa; SB 7.14.20-23
dvādaśyām — on the twelfth lunar day; SB 7.14.20-23
śravaṇa-dvādaśyām — on the twelfth lunar day of the bright fortnight in the month of Bhādra, the day famous as the Śravaṇa-dvādaśī; SB 8.18.5
dvādaśyām — on the twelfth day of the moon; SB 8.18.6
dvādaśyām — when the Dvādaśī day; SB 9.4.38
dvādaśyām — on the Dvādaśī day; SB 9.4.39-40
dvādaśyām — on the twelfth day; SB 10.28.1
dvādaśyām — on the twelfth day of either fortnight of the month; SB 12.12.60