How It Works
The Gregorian calendar is purely solar: it tracks Earth's 365.25-day journey around the sun, with a leap day (闰年, rùnnián) added every four years to stay aligned. Twelve months of 28 to 31 days give the familiar year that opens on 元旦 (yuándàn), January 1st.
Days are grouped into the seven-day week, called 星期 (xīngqī). Usefully for learners, the weekdays are simply numbered: 星期一 (Monday) through 星期六 (Saturday), with Sunday as 星期天 or 星期日. No vocabulary memorization needed—just count.
Origins & History
The calendar was introduced by Pope Gregory XIII in 1582 to correct small drift in the older Julian system, and it gradually became the global standard for trade and diplomacy. For most of its history, China instead used a lunisolar calendar tied to imperial reign eras.
China adopted the Gregorian calendar on January 1, 1912, when the newly founded Republic of China replaced imperial reckoning to modernize and synchronize with the wider world. The People's Republic confirmed it as the official civil calendar in 1949.
In Chinese Life Today
The 公历 governs nearly all official and practical life: school terms, work schedules, banking, contracts, and national holidays like 国庆节 (guóqìngjié), National Day on October 1st. If a date appears in a digital or formal context, it is almost certainly Gregorian.
Yet it never fully replaced tradition. Most Chinese calendars print both systems side by side, so a single day shows its Gregorian date alongside its 农历 counterpart. People may celebrate a Gregorian birthday for work but a lunar one at home—two calendars, one life.
Why It Matters for Learners
Because dates, weekdays, and scheduling all run on the 公历, it's the calendar you'll use most when speaking Chinese—making appointments, buying tickets, or asking 今天几号? ("What's the date today?"). Knowing it grounds you, while recognizing the parallel 农历 reveals the cultural rhythm beneath everyday Chinese life.
The Twelve Months
Click any month to read about it. In Chinese, months are just numbered — 一月 is simply "month one."