Adhika-māsa (Sanskrit: अधिकमास, romanized: Adhikamāsa), also called the Adhik-mas, Mala-māsa, and the Purushottama-māsa, is an intercalated month[1] in the Hindu calendar that is inserted to keep the lunar calendar aligned with the months of the year.[2][3] The adhika-masa is an extra lunar month added to the solar calendar every three years[4] so that the lunar and the solar years are synchronised, along with the agricultural cycle and seasons.[5]