Gregorian calendar

==External links==
{{Wikisource|Translation:Inter gravissimas|''Inter gravissimas'' in English}}
* {{In Our Time|Gregorian calendar|p00548m9|Gregorian_calendar}}
* [http://www.fourmilab.ch/documents/calendar/ Calendar Converter]
* [http://www.bluewaterarts.com/calendar/NewInterGravissimas.htm Inter Gravissimas] {{in lang|la|fr|en}}
* [http://webexhibits.org/calendars/year-history.html History of Gregorian Calendar] {{Webarchive|url=https://web.archive.org/web/20140106001448/http://www.webexhibits.org/calendars/year-history.html |date=6 January 2014 }}
* [http://www.norbyhus.dk/calendar.php The Perpetual Calendar Gregorian Calendar adoption dates for many countries. ]
* [http://www.recordholders.org/en/records/dates.html World records for mentally calculating the day of the week in the Gregorian Calendar ]
* [https://web.archive.org/web/20051228123115/http://www.tondering.dk/claus/calendar.html The Calendar FAQ] – Frequently Asked Questions about Calendars
* [http://curiousnotions.com/todays-date Today's date (Gregorian) in over 800 more-or-less obscure foreign languages] {{Webarchive|url=https://web.archive.org/web/20230308031826/https://curiousnotions.com/todays-date/ |date=8 March 2023 }}

{{calendars}}
{{Time Topics}}
{{Time measurement and standards}}
{{Chronology}}
{{Time in religion and mythology}}
{{Authority control}}

{{DEFAULTSORT:Gregorian Calendar}}
[[Category:Gregorian calendar| ]]
[[Category:1580s introductions]]
[[Category:1582 establishments]]
[[Category:1582 establishments in Europe]]
[[Category:Articles which contain graphical timelines]]