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Chinese Gender Calendar
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Chinese gender calendar 2039

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 · 2039

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.

Gender chart by nominal lunar age and conception period
Lunar ageLunar month 122038 – Lunar month 12039 – Lunar month 22039 – Lunar month 32039 – Lunar month 42039 – Lunar month 52039 – Lunar month 52039 · Repeated month – Lunar month 62039 – Lunar month 72039 – Lunar month 82039 – Lunar month 92039 – Lunar month 102039 – Lunar month 112039 –
18BBBGBBBBBBBBB
19BGBBGBBBBBBBB
20BBGBBGGBBBBBB
21BGBGBBBGBBBBB
22BBGBGBBBGBBBB
23BGBGBGGBBGBBB
24BBGBGBBGBBGBB
25BGBGBGGBGBBGB
26BBGBGBBGBGBBG
27GGBGBGGBGBGBB
28BBGBGBBGBGBGB
29BGBGBGGBGBGBG
30GBGBGBBGBGBGB
31BGBGBGGBGBGBG
32GBGBGBBGBGBGB
33BGBGBGGBGBGBG
34GBGBGBBGBGBGB
35BGBGBGGBGBGBG
36GBGBGBBGBGBGB
37BGBGBGGBGBGBG
38GBGBGBBGBGBGB
39BGBGBGGBGBGBG
40GBGBGBBGBGBGB
41BGBGBGGBGBGBG
42GBGBGBBGBGBGB
43BGBGBGGBGBGBG

How to read this calendar

  1. 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.
  2. 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.
  3. 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.

Use the date-based calculator

Lunar months and Gregorian date ranges

Lunar monthLunar yearGregorian dates
122038 –
12039 –
22039 –
32039 –
42039 –
52039 –
5 · Repeated month2039 –
62039 –
72039 –
82039 –
92039 –
102039 –
112039 –

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.

Hong Kong Observatory · 2039

Chinese gender calendar: history and legends