Chinese gender calendar 2040
This chart is a game. The mother’s age and the conception date cannot reliably predict a baby’s sex.
Lunar New Year · 13 lunar-month periods in this Gregorian year
Download PDF · 2040
Two A4 landscape pages: the chart, then the date ranges and instructions.
B = BoyG = Girl
Scroll horizontally to see every month. The age column stays visible.
| Lunar age | Lunar month 112039 – | Lunar month 122039 – | Lunar month 12040 – | Lunar month 22040 – | Lunar month 32040 – | Lunar month 42040 – | Lunar month 52040 – | Lunar month 62040 – | Lunar month 72040 – | Lunar month 82040 – | Lunar month 92040 – | Lunar month 102040 – | Lunar month 112040 – |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 18 | B | B | B | B | G | B | B | B | B | B | B | B | B |
| 19 | B | B | G | B | B | G | B | B | B | B | B | B | B |
| 20 | B | B | B | G | B | B | G | B | B | B | B | B | B |
| 21 | B | B | G | B | G | B | B | G | B | B | B | B | B |
| 22 | B | B | B | G | B | G | B | B | G | B | B | B | B |
| 23 | B | B | G | B | G | B | G | B | B | G | B | B | B |
| 24 | B | B | B | G | B | G | B | G | B | B | G | B | B |
| 25 | B | B | G | B | G | B | G | B | G | B | B | G | B |
| 26 | G | B | B | G | B | G | B | G | B | G | B | B | G |
| 27 | B | G | G | B | G | B | G | B | G | B | G | B | B |
| 28 | B | B | B | G | B | G | B | G | B | G | B | G | B |
| 29 | G | B | G | B | G | B | G | B | G | B | G | B | G |
| 30 | B | G | B | G | B | G | B | G | B | G | B | G | B |
| 31 | G | B | G | B | G | B | G | B | G | B | G | B | G |
| 32 | B | G | B | G | B | G | B | G | B | G | B | G | B |
| 33 | G | B | G | B | G | B | G | B | G | B | G | B | G |
| 34 | B | G | B | G | B | G | B | G | B | G | B | G | B |
| 35 | G | B | G | B | G | B | G | B | G | B | G | B | G |
| 36 | B | G | B | G | B | G | B | G | B | G | B | G | B |
| 37 | G | B | G | B | G | B | G | B | G | B | G | B | G |
| 38 | B | G | B | G | B | G | B | G | B | G | B | G | B |
| 39 | G | B | G | B | G | B | G | B | G | B | G | B | G |
| 40 | B | G | B | G | B | G | B | G | B | G | B | G | B |
| 41 | G | B | G | B | G | B | G | B | G | B | G | B | G |
| 42 | B | G | B | G | B | G | B | G | B | G | B | G | B |
| 43 | G | B | G | B | G | B | G | B | G | B | G | B | G |
How to read this calendar
- Find the estimated conception date in the Gregorian date ranges. The columns follow lunar months, so they do not start on the first day of each Gregorian month. The first and last periods are limited to the selected calendar year.
- Use the mother’s nominal lunar age at conception: conception lunar year minus birth lunar year, plus one. Under this convention, age increases at Lunar New Year rather than on a birthday. The date-based calculator can work it out for you.
- Read the cell where that age row meets the conception-period column. The letter gives the result of the game; it does not give a probability.
Lunar months and Gregorian date ranges
| Lunar month | Lunar year | Gregorian dates |
|---|---|---|
| 11 | 2039 | – |
| 12 | 2039 | – |
| 1 | 2040 | – |
| 2 | 2040 | – |
| 3 | 2040 | – |
| 4 | 2040 | – |
| 5 | 2040 | – |
| 6 | 2040 | – |
| 7 | 2040 | – |
| 8 | 2040 | – |
| 9 | 2040 | – |
| 10 | 2040 | – |
| 11 | 2040 | – |
Dates and method
This is the same 26-row chart used by our calculator, for nominal ages 18–43. Its historical origin is undocumented. A repeated lunar month uses the same result column as the regular month.
The Hong Kong Observatory publishes Gregorian–lunar conversion tables. They provide a reference for dates, not evidence for the gender chart.