Vridhi tithi

Vridhi tithi (Vṛddhi-tithi) — a special astronomical phenomenon, the opposite of Kshaya: a tithi that lasts longer than a day and spans two consecutive sunrises, so its number stands in the calendar two days running. Tradition reads this as a sign of particular fullness.

Place in the system

Tithi is the lunar day, 12° of divergence between the Moon and the Sun. Ordinarily, every tithi shows up at sunrise exactly once. Vridhi is the exception: the tithi spans two consecutive dawns, and the calendar shows it two days running.

Vridhi does not belong to any of the five classes (Nanda/Bhadra/Jaya/Rikta/Purna) and cancels neither the tithi's number nor its class: a stretched Shukla Dashami remains the tenth tithi of the Purna class. This is a property of a particular tithi's calendar appearance in a particular month, not a separate sixth class.

The Vridhi phenomenon occurs regularly in the calendar — panchanga marks such days separately; it happens more often in months when the Moon moves slowly relative to the Sun (near apogee). Classical literature places Vridhi tithis among the "full" or "excess" forms that call for particular attention.

Practical meaning

By the classical rules of muhurta, a Vridhi tithi is favorable for austerity, for vows and fasting, for charity, for rites for ancestors. Tradition directly connects it with an excess of force — what is conceived here gets more breath than usual.

In Indian folk practice a Vridhi tithi is sometimes connected with the reinforcement of a rite: a fast or rite begun on a Vridhi tithi is read by tradition as gaining more time to unfold. This is a form of "extra breath" that can be put to use.

When Vridhi falls on a major festival — Ekadashi, for instance — the vrata is kept on one of the two days; the choice of day differs by school (in the Vaishnava tradition the fast is more often kept on the second day, in Smarta practice — on the first), and the panchanga indicates which one.

In daily practice

A Vridhi tithi is a day on which it's good to start a long-running matter. A fast, a vow, austerity, study — anything requiring long endurance gets an extra resource here.

Vridhi also suits charity — especially the kind meant for long-running effect. A gift to a temple, support for a teacher, planting a tree — tradition holds such charity on Vridhi to be especially weighty.

A Vridhi tithi also suits practice requiring steadiness: meditation, japa, studying scripture. The "extra day" here is not an anomaly, but a gift.

How much this day is yours is refined by Tara Bala — the count from your birth nakshatra to the one the day falls under. Vridhi sets the background of excess, and the personal layer shows whether it falls within your rhythm today.