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Lunar calendar converter
Convert any solar (Gregorian) date to the Vietnamese lunar calendar and back, with the leap-month flag and the year's can-chi name. Dates are computed astronomically for Vietnam (UTC+7) with the Hồ Ngọc Đức method. This is a conversion only — we make no claims about lucky or unlucky days.
Solar → Lunar
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Pick a date to convert.
Lunar → Solar
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Next step
Put both dates on your invitation
Our templates show the solar date and the lunar date side by side, in English and Vietnamese, with RSVP built in.
Self-check
Known pairs recomputed on every page load, both directions: