Vaishnava Dharmashastra 76.1

76.1

amāvāsyās tisro 'ṣṭakās tisro 'nvaṣṭakā māghī prauṣṭhapady ūrdhvaṃ kṛṣṇatrayodaśī vrīhiyavapākau ceti ||

The (twelve) days of new moon, the three Ashtakâs, the three Anvashtakâs, a Mâgha day (i.e. 'day on which the moon enters the lunar asterism Maghâ'), which falls on the thirteenth of the dark half of the month Praushthapada, and the two seasons when rice and barley grow ripe (or autumn and spring):