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Bodhastra
Your birth date

Date-only systems resolve immediately. Systems that require a birth time or place will say so instead of guessing.

Traditions to include

Choose one or several. With no choices, general browsing shows every tradition.

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Rabjung years pair twelve animals with five elements; Phugpa dates keep their calendar label visible.

Facts & lineage · calendar contract

“Tibetan calendar” is a family name

Phugpa is the most widely used version and the one followed by the Dalai Lama's institutions. Tsurphu and other versions remain living calculations, not errors to smooth away.

What changes

Tibetan months are lunar but numbered through a solar framework. Leap months, skipped dates and repeated dates reconcile clocks that do not divide evenly.

Different calculation lineages use different constants and rules. Janson documents cases where their calendars differ by a day and cases where the month numbering differs. A date converter is therefore a model with a name, not a neutral lookup table.

Bodhastra's contract

The calculator implements Janson's Phugpa formulas through an auditable MIT-licensed library, supports 1900–2100, prints the calculated Losar, and labels every result Phugpa. It does not silently choose a local festival date from another community.

Bodhastra documents what astrological traditions have said, and when they started saying it. It is presented as cultural history and entertainment. Nothing here is medical, psychological, financial or predictive advice, and nothing here is a claim about what will happen to you.

Every source, listed

Place data from GeoNames, used under CC BY 4.0.