Bhagavatapurana 7.14.20

7.14.20

ayane viṣuve kuryādvyatīpāte dinakṣaye /
candrādityoparāge ca dvādaśyāṃ śravaṇeṣu ca //

20. And also at the beginning of Uttarayana and Dakshinayana and on the first days of the months of Chaitra and Asvayuja,

on a Vyatipata day; on a day when the Thiti is shorter in length than a day during eclipse of the sun, or the moon, on Dwadasi day conjoined with Sravana;