Editing Chinese calendar (section)

====Modern Chinese calendar====

The Chinese calendar lost its place as the country's official calendar at the beginning of the 20th century,<ref name="Sun Yat-sen">{{cite book |author=Sun Yat-sen |url=https://confuciusinstitute.unl.edu/Week%205.2%20-%20Sun%20Yat-sen%20-%20Inaugural%20Address%20of%20the%20Provisional%20President%28January%201%2C%201912%29.pdf |title= |date=1982 |publisher={{lang|zh|中华书局}} |volume=v. 2 |location=Beijing |page=5 |script-title=zh:孙中山全集 |trans-title=The Complete Works of Sun Yat-sen |script-chapter=zh:临时大总统改历改元通电 |trans-chapter=Provisional President's open telegram on calendar change and era change |access-date=2 May 2023 |orig-year=Telegram originally sent 1 January 1912 |archive-url=https://web.archive.org/web/20230129194502/https://confuciusinstitute.unl.edu/Week%205.2%20-%20Sun%20Yat-sen%20-%20Inaugural%20Address%20of%20the%20Provisional%20President%28January%201%2C%201912%29.pdf |archive-date=29 January 2023 |url-status=live}}</ref> its use has continued. 

{{anchor|Republic of China Calendar}}
The ''Republic of China Calendar'' published by the [[Beiyang government]] of the Republic of China still listed the dates of the Chinese calendar in addition to the Gregorian calendar. 

{{anchor|Kuómín calendar|Kuomin calendar}}
In 1929, the [[Nationalist government]] tried to ban the traditional Chinese calendar. The ''{{tlit|zh|pinyin|Kuómín}} Calendar'' published by the government no longer listed the dates of the Chinese calendar. 
However, Chinese people were used to the traditional calendar and many traditional customs were based on the Chinese calendar. The ban failed and was lifted in 1934.<ref>{{Cite web |title=Rules for the Chinese Calendar |url=https://ytliu0.github.io/ChineseCalendar/rules.html |url-status=live |archive-url=https://web.archive.org/web/20230220003057/https://ytliu0.github.io/ChineseCalendar/rules.html |archive-date=20 February 2023 |access-date=2023-02-20 |website=ytliu0.github.io}}</ref>

{{anchor|Wànniánlì calendar|Wannianli calendar}}
The latest Chinese calendar was "New Edition of {{tlit|zh|pinyin|Wànniánlì}}, revised edition", edited by Beijing Purple Mountain Observatory, People's Republic of China.<ref>{{Cite book |last=CAS |first=Purple Mountain Observatory |title=New Edition of Wànniánlì, revised edition |publisher=Popular Science Press |year=1986}}</ref>

In China, the modern calendar is defined by the [[National Standards of the People's Republic of China|Chinese national standard]] GB/T 33661–2017,<ref>{{Cite web |script-title=zh:国家标准 {{!}} GB/T 33661-2017 |url=http://c.gb688.cn/bzgk/gb/showGb?type=online&hcno=E107EA4DE9725EDF819F33C60A44B296 |access-date=28 September 2023 |archive-date=28 September 2023 |archive-url=https://web.archive.org/web/20230928111539/http://c.gb688.cn/bzgk/gb/showGb?type=online&hcno=E107EA4DE9725EDF819F33C60A44B296 |url-status=live }}</ref> "Calculation and Promulgation of the Chinese Calendar", issued by the [[Standardization Administration of China]] on 12 May 2017.

Although modern-day China uses the [[Gregorian calendar]], the traditional Chinese calendar governs holidays, such as the [[Chinese New Year]] and [[Lantern Festival]], in both China and [[overseas Chinese]] communities. It also provides the traditional Chinese nomenclature of dates within a year which people use to select auspicious days for [[Auspicious wedding dates|weddings]], funerals, moving or starting a business.<ref>{{Cite journal |last1=Xiao |first1=Fang |last2=Zhang |first2=Juwen |last3=Long |first3=Bill |date=2017 |title=The Predicament, Revitalization, and Future of Traditional Chinese Festivals |jstor=44790971 |journal=Western Folklore |volume=76 |issue=2 |pages=181–196 }}</ref> The evening state-run news program ''[[Xinwen Lianbo]]'' in the [[People's Republic of China]] continues to announce the months and dates in both the Gregorian and the traditional lunisolar calendar.

To optimize the Chinese calendar, astronomers have proposed a number of changes. [[Kao Ping-tse]] ({{zh|labels=no|c=高平子}}; 1888–1970), a Chinese astronomer who co-founded the [[Purple Mountain Observatory]], proposed that month numbers be calculated before the new moon and solar terms to be rounded to the day. Since the intercalary month is determined by the first month without a mid-climate and the mid-climate time varies by time zone, countries that adopted the calendar but calculate with their own time could vary from the time in China.<ref>{{Cite book |last=Martzloff |first=Jean-Claude |url=https://books.google.com/books?id=SYj2DAAAQBAJ&dq=Gao+Pingzi+month+numbers&pg=PA242 |title=Astronomy and Calendars – The Other Chinese Mathematics: 104 BCE - 1644 CE |date=2016-09-01 |publisher=Springer |isbn=978-3-662-49718-0 |language=en |access-date=19 October 2022 |archive-date=8 October 2023 |archive-url=https://web.archive.org/web/20231008220827/https://books.google.com/books?id=SYj2DAAAQBAJ&dq=Gao+Pingzi+month+numbers&pg=PA242 |url-status=live }}</ref>