Adhika Masa

A lunar month gains an extra span when the Sun does not pass into a new zodiac sign during that month. This intercalary month is called Adhika Masa, or an “extra month,” and it shifts through the lunar calendar rather than appearing in one fixed season. It occurs roughly every third year, and may fall in different named months in different years.

What Adhika Masa means

The Hindu lunisolar calendar brings lunar months and the solar year back into alignment by inserting an extra month when required. Adhika Masa therefore has no permanent Gregorian date and does not occur annually. The month takes the name of the lunar month it repeats, while the word adhika means extra or additional.

A tithi is a lunar day. Each lunar month has a bright half, called Shukla Paksha (the waxing half), and a dark half, called Krishna Paksha (the waning half). The period begins with the first tithi of the bright half, Pratipada, and concludes with Amavasya, the new-moon tithi and fifteenth tithi of the dark half.

At both boundaries, the tithi current at sunrise governs the observance. Thus, the beginning is kept on the sunrise day carrying Shukla Paksha Pratipada in the intercalary month, and the conclusion is kept on the sunrise day carrying Krishna Paksha Amavasya in that same month. The civil date changes from year to year.

What the month asks of an observer

Adhika Masa is widely treated as a period for making additional spiritual effort. Common practices include daily worship, recitation of the names of a chosen deity, temple visits, listening to or reading sacred narratives, acts of charity, feeding others, and restraint in food and conduct. The emphasis is generally on repetition and sincerity over elaborate display.

Fasting is not a single universal requirement. Some observers keep a simple vegetarian diet throughout the month; others fast on selected tithis or follow a personal vow. Household practice may include avoiding especially lavish celebrations, while continuing ordinary duties. Such restrictions should not be presented as one rule binding every region or lineage.

The two boundaries

The opening day marks the resolve to observe the additional month. A household may bathe, establish a regular place of worship, light a lamp, offer flowers and food, and state the intended vow. Charity and devotional practice continue through the month rather than ending after the opening ritual.

The closing Amavasya marks completion. Offerings, charity, worship, and remembrance of the month’s vow are brought to an end according to family practice. The exact observance may be modest or elaborate, but the governing principle remains the sunrise tithi: the relevant lunar day must be present at sunrise for that date to carry the observance.

One traditional prescription associated with Adhika Masa describes thirty-three sweet cakes, or apupa, prepared with jaggery and ghee and offered with devotion. This is not a universal household requirement, but it explains the continuing custom of preparing pua, malpua, or similar sweets in some communities. The period also connects naturally with other vow-based observances in the lunar calendar, especially those centred on charity and sustained worship.

Adhika Masa gives the lunisolar calendar an additional month when needed to remain aligned with the solar year. Its irregular appearance—roughly once every three years—makes it a period set apart for renewed discipline rather than an annual festival with a fixed date.

Traditional Hindu practice understands the month as especially suitable for devotional effort, charity, self-restraint, service, and remembrance of the chosen deity. In Vaishnava settings it is often called Purushottama Masa, linking the month with Purushottama, a name of Vishnu; this naming and its associated theology are not expressed identically in every regional tradition.

The month’s meaning is carried by continuity: a vow or practice begins at the opening Pratipada, is sustained across the extra month, and is completed at Amavasya. The traditional mention of thirty-three jaggery-and-ghee cakes also gives some observances a concrete offering, though food customs vary. Its closing Amavasya connects the period with the wider discipline of new-moon worship, charity, and remembrance.

Begin with a bath, a clean place of worship, a lamp, and a clear intention for the month-long practice. Common observances include daily prayer, recitation of a deity’s names, reading or hearing sacred narratives, temple worship, charity, feeding guests or those in need, and a simple vegetarian diet.

Fasting varies. Some households keep a restrained diet throughout Adhika Masa, while others fast only on selected lunar days or undertake a particular vow. Classical and family prescriptions should be distinguished from modern convenience: no single fasting pattern governs every observer.

At the opening, the intention is made on the sunrise day carrying Shukla Paksha Pratipada. At the close, worship and charitable practice are completed on the sunrise day carrying Krishna Paksha Amavasya. A traditional food observance mentions thirty-three apupa—sweet cakes made with jaggery and ghee—for offering. Where this custom is followed today, pua or malpua may be prepared and shared as prasad, or sanctified food. The offering is customary in some households, not compulsory for all.