2040 — Year of the Monkey 猴 庚申

2040 is the year of the Monkey 猴 — year pillar 庚申, Yang Metal. Every date on this page is computed by the same astronomical kernel that powers our public API, to the minute.

Lichun 2040-02-04 13:39:34 · CNY 2040-02-12 · engine 0.1.0

The two-calendar window in 2040

In 2040, Lichun 立春 falls first (2040-02-04) and Chinese New Year 8 days later (2040-02-12). Anyone born inside that 8-day window gets a different zodiac animal and year pillar depending on which convention their tool follows — BaZi practice switches at the exact Lichun instant (2040-02-04 13:39:34, Beijing), folk calendar practice at the new moon. This is not an edge case we gloss over — it is the single most common source of wrong zodiac years, and our engine comparison tool shows it live with three engines side by side.

Your Kua number for 2040

Born inside 2040 (after Lichun)? Your Ming Gua: male (2000 − 2040) mod 9 = 5 → Kun 坤 · female (2040 − 2000 + 6) mod 9 = 1 → Kan 坎（five yellow substituted per convention）. Born before Lichun? The formula runs on 2039 — the Kua calculator applies the boundary for your exact birthday.

FAQ

When does the year of the Monkey (庚申) start and end?

By the exact Lichun instant: from 2040-02-04 13:39:34 Beijing to the Lichun of 2041. By the lunar calendar: from Chinese New Year (2040-02-12) to the next new-year new moon. The two definitions disagree about 8 days of 2040 — see the window note above.

Is 2040 a leap month year?

No — the lunar year 2040 has 12 months and no leap month.

What is my Kua number if I was born in 2040?

For births after Lichun: male 5 (坤), female 1 (坎). Births before the exact Lichun instant belong to 2039 and use that year in the formula — most online calculators get early-February birthdays wrong here.

Tools for this year

All 24 solar terms of 2040 · Almanac for Chinese New Year (2040-02-12) · Kua number calculator · Four-pillar chart · All Monkey years