Row 21 of 18–45
Chinese Gender Chart: Lunar Age 21
At lunar age 21 the traditional chart predicts a boy in 1 of the 12 lunar months and a girl in 11. Here is the full row, what makes it different from the rows either side of it, and how to tell whether 21 is actually your lunar age.
What row 21 says
If the mother’s lunar age at conception is 21, the traditional chart predicts:
- Boy in lunar month 1
- Girl in lunar months 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12
So this row leans girl, at 11 months out of twelve. Across the whole chart the average row gives 5.9 boy months, and the extremes are row 18 with 10 boy months and row 21 with 1.
The longest unbroken stretch in this row is 11 consecutive months of girl, running from lunar month 2 to 12.
One thing worth repeating, because it is where most people go wrong: these are lunar months. Lunar month 1 begins on Chinese New Year, which falls between 21 January and 20 February, so it never lines up with January. The table further down converts them into real 2026 dates.
How row 21 differs from its neighbours
Rows next to each other on this chart are not gentle variations of one another. Being off by a single year of lunar age changes the answer in a large share of months, which is exactly why the Chinese New Year cutoff matters so much:
- Against lunar age 20, the prediction flips in 10 of 12 months: lunar months 1, 2, 4, 5, 6, 7, 8, 9, 11 and 12.
- Against lunar age 22, it flips in 5 of 12 months: lunar months 1, 2, 3, 5 and 8.
If a calculator works out your lunar age with a simple “add one to your age” rule instead of checking Chinese New Year, it can land you on the wrong row entirely, and as the numbers above show, a wrong row is not a near miss.
Are you lunar age 21?
Lunar age is not your ordinary age. You count as one year old on the day you are born, and everyone gains a year together on Chinese New Year rather than on their own birthday. So lunar age 21 does not map onto a single Gregorian birth year; it maps onto a lunar year that starts and ends on Chinese New Year.
| Lunar age 21 during | Born between | Lunar year | Zodiac |
|---|---|---|---|
| 2026 | 29 Jan 2006 – 17 Feb 2007 | 2006 | Dog |
| 2027 | 18 Feb 2007 – 6 Feb 2008 | 2007 | Pig |
| 2028 | 7 Feb 2008 – 25 Jan 2009 | 2008 | Rat |
| 2029 | 26 Jan 2009 – 13 Feb 2010 | 2009 | Ox |
Notice that each window starts on a Chinese New Year, not on 1 January. Someone born in mid-January 2007 still belongs to lunar year 2006, because Chinese New Year had not arrived yet. That single detail is the most common cause of a wrong result.
Lunar month 2026 dates at this age
Chinese New Year 2026 falls on 17 February 2026. Find your conception date in the middle column and read the prediction on the right.
| Lunar month | 2026 dates | Prediction |
|---|---|---|
| 1 | 17 Feb – 18 Mar | Boy |
| 2 | 19 Mar – 16 Apr | Girl |
| 3 | 17 Apr – 16 May | Girl |
| 4 | 17 May – 14 Jun | Girl |
| 5 | 15 Jun – 13 Jul | Girl |
| 6 | 14 Jul – 12 Aug | Girl |
| 7 | 13 Aug – 10 Sept | Girl |
| 8 | 11 Sept – 9 Oct | Girl |
| 9 | 10 Oct – 8 Nov | Girl |
| 10 | 9 Nov – 8 Dec | Girl |
| 11 | 9 Dec – 7 Jan | Girl |
| 12 | 8 Jan – 5 Feb | Girl |
Check your own dates
Do not assume lunar age 21 is yours. It depends on where your birthday sits relative to Chinese New Year, and on which lunar month your conception date falls in. Enter your real dates below and both are worked out for you, including leap months.
Dates from 1900-01-31 to 2101-01-28 are supported. Nothing you type leaves your browser The whole calculation runs on this page.
Questions about lunar age 21
Which months predict a boy at lunar age 21?
At lunar age 21 the chart predicts a boy for lunar month 1. These are lunar months counted from Chinese New Year, not January to December.
What birth years give a lunar age of 21?
To be lunar age 21 during 2026, you were born in lunar year 2006, between 29 January 2006 and 17 February 2007, the year of the Dog. To be lunar age 21 during 2027, you were born in lunar year 2007, between 18 February 2007 and 6 February 2008, the year of the Pig. To be lunar age 21 during 2028, you were born in lunar year 2008, between 7 February 2008 and 25 January 2009, the year of the Rat. To be lunar age 21 during 2029, you were born in lunar year 2009, between 26 January 2009 and 13 February 2010, the year of the Ox.
What changes if my lunar age is 21 instead of 20?
The prediction flips in 10 of the 12 months: lunar months 1, 2, 4, 5, 6, 7, 8, 9, 11 and 12. That is why getting the Chinese New Year cutoff right matters: one year of difference changes the answer in 83 percent of months.