Gregorian to lunar
Convert a valid Gregorian date, without guessing missing input.
XINAN LIFE BOOK · Lunar–Gregorian conversion
Different calendars. The same meaningful day.
Choose a direction and confirm the date and leap-month status. Compare two representations of the same day. Explicitly reuse a saved birth date or query independently; a name is not needed.
AVAILABILITY
Opens after production validation
The method, inputs and boundaries are public. Online lookup and account saving are not yet open. There is no charge and no Life Book credit is used.
Lunar to Gregorian
Changing direction clears earlier inputs to prevent mixing calendar types.
Leap-month validation
Validate leap and regular months separately and cross-check the same date both ways.
This tool’s method
Uses lunar-javascript 1.7.7 and the UTC+8 calendar convention. A leap month is an extra month with the same number, not a Gregorian leap day. Nonexistent months and days are rejected.