BAZI KNOWLEDGE BASE
Convert a Chinese lunar birthday to Gregorian: the 2023 leap month
Converting a Chinese lunar birthday requires the full year, month, day and leap-month status. There is no fixed number of days to add or subtract. When the same month number occurs twice, omitting the leap label can move the result about a month away.
Two first days of month two, thirty days apart in 2023
The Hong Kong Observatory’s daily 2023 table places regular month two, day one on 20 February and leap month two, day one on 22 March. The month and day numbers match but the dates do not. Where an English table repeats a month label, check the leap designation and annual sequence rather than choosing the first matching number.
| Lunar date in 2023 | Gregorian | Distinction |
|---|---|---|
| Month 2, day 1 | 2023-02-20 | Regular month |
| Leap month 2, day 1 | 2023-03-22 | Leap month |
Start with the birth year, locate the date, then check back
Record the original calendar and full birth year, then locate its month, leap status and day in that year’s table. Read back from the resulting Gregorian row and verify every field. This year’s recurrence of a lunar birthday cannot replace its date in the birth year.
“Rabbit year, second month, first day” still lacks a unique year: animal signs repeat every twelve years and stem-branch years every sixty. Use available records to establish the year rather than inferring it from personality.
Tables have a supported range and a date basis
The Observatory publishes tables for 1901–2100 and notes that predictions near midnight can affect future date assignments. That published range is not a promise that Clarify provides a lunar-conversion service across the same years.
For overseas records, establish which region’s lunar calendar label was used and whether any zone conversion already occurred. Calendar lookup does not convert a clock: the birthplace’s local time and historical zone still need separate confirmation.
After conversion, the BaZi month still follows Jie
Clarify’s current form accepts Gregorian dates, without lunar or leap-month options. Enter a verified Gregorian conversion and retain the original lunar record. Lunar day one is not a BaZi month boundary, so a leap second month must not simply be assigned an additional Mao month.