The practitioners of Sanatana Dharma accept both Vedic calendars – the solar and the lunar, which follow the movement of the sun and moon, respectively. Due to the difference in the time taken for the sun and moon to complete their cycles, the lunar calendar lags by 11 days. An additional (adhik) maas or month is added to the lunar year after about 2 years and 8 months to ensure these two calendars are aligned and that astrological calculations are not affected.
In the beginning, this Adhik maas had no auspicious tithi. It was considered a mala-maas or just an additional month with no benefit. The Padma Purana states how this special month, which was not governed by any Devata, was accepted by Lord Sri Krishna or Sri Purushottama Himself. From that time, this became Purushottama Masa, Lord Krishna’s own month.
“Exemption order ref no. AAATI0017PF2021901 dated 24/09/2021 valid upto 31/03/2026”