Dhanurmas is a name given to a period of nearly one month. Dhanurmas starts usually around 14--16 December and extends up to the mid of January (Hindu calendar months Margashirsha-Pausha). This period ends with the Makar Sankranti - the end of dakshinayana mostly occurs during the Pausha month of the Hindu Lunar calendar.

This period of month is considered as highly auspicious for Vishnu devotees.