Lunar birthday · Free

Your birthday,
on the other calendar.

Many Koreans have two birthdays: the solar date on the ID card and the lunar date the family celebrates. Find yours, and the day it falls on this year.

Calendar ruleWorked out from the calendar by a fixed rule. The same for everybody, and not read from your chart.

Why the lunar birthday still matters

Seaweed soup on the morning of the lunar birthday is a habit older than the solar calendar in Korea; many grandparents never switched.

Because the lunar date moves against the solar one, the same birthday lands on a different day every year — that is what this page tracks.

The Saju chart does not care which calendar you were born under: it reads the moment. Give it either date and it builds the same pillars.

A calendar conversion, the same for everybody, on the Korean lunar calendar as published by the Korea Astronomy and Space Science Institute. The Chinese lunar calendar starts some months on a different day, so a Chinese converter can disagree by a day; this page follows Korea's. Range 1900–2050, the extent of the Korean table.

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