This is a list of adoption dates of the Gregorian calendar by country. For explanation, see the article about the
Gregorian calendar
The Gregorian calendar is the calendar used in most parts of the world. It was introduced in October 1582 by Pope Gregory XIII as a modification of, and replacement for, the Julian calendar. The principal change was to space leap years diff ...
.
Except where stated otherwise, the transition was a move by the civil authorities from the
Julian to the
Gregorian calendar
The Gregorian calendar is the calendar used in most parts of the world. It was introduced in October 1582 by Pope Gregory XIII as a modification of, and replacement for, the Julian calendar. The principal change was to space leap years diff ...
. In
religious
Religion is usually defined as a social-cultural system of designated behaviors and practices, morals, beliefs, worldviews, texts, sanctified places, prophecies, ethics, or organizations, that generally relates humanity to supernatural, tran ...
sources it could be that the Julian calendar was used for a longer period of time, in particular by
Protestant
Protestantism is a branch of Christianity that follows the theological tenets of the Protestant Reformation, a movement that began seeking to reform the Catholic Church from within in the 16th century against what its followers perceived to ...
and
Eastern Orthodox
Eastern Orthodoxy, also known as Eastern Orthodox Christianity, is one of the three main branches of Chalcedonian Christianity, alongside Catholicism and Protestantism.
Like the Pentarchy of the first millennium, the mainstream (or "canonical") ...
churches. The historic area does not necessarily match the present-day area or country. The column 'Present country' only provides a logic search entry. With a few exceptions, the former colonies of European powers are not shown separately.
There are only four countries which have not adopted the Gregorian calendar: Ethiopia (
Ethiopian calendar
The Ethiopian calendar ( am, የኢትዮጲያ ዘመን ኣቆጣጠር; Oromo: Akka Lakkofsa Itoophiyaatti; Ge'ez: ዓዉደ ወርሕ; Tigrinya: ዓዉደ ኣዋርሕ), or Ge'ez calendar ( Ge'ez: ዓዉደ ወርሕ; Tigrinya: ዓዉ ...
), Nepal (
Vikram Samvat
Vikram Samvat (IAST: ''Vikrama Samvat''; abbreviated VS) or Bikram Sambat B.S. and also known as the Vikrami calendar, is a Hindu calendar historically used in the Indian subcontinent. Vikram Samvat is generally 57 years ahead of Gregorian Calend ...
and
Nepal Sambat
Nepal Sambat, also spelled as Nepala Sambata, (Nepal Bhasa: , Nepali: ) is the lunisolar calendar used by the Newari people of Nepal. The Calendar era began on 20 October 879 AD, with 1142 in Nepal Sambat corresponding to the year 2021–2022 ...
), Iran and Afghanistan (
Solar Hijri calendar).
List
Legend
See also
*
cal (command)
is a command-line utility on a number of computer operating systems including Unix, Plan 9, Inferno and Unix-like operating systems such as Linux that prints an ASCII calendar of the given month or year. If the user does not specify any comman ...
*
Adoption of the Gregorian calendar
The adoption of the Gregorian Calendar was an event in the early modern history of most cultures and societies, marking a change from their traditional (or "old style") dating system to the modern (or "new style") dating system the Gregorian ...
*
Old Style and New Style dates
Old Style (O.S.) and New Style (N.S.) indicate dating systems before and after a calendar change, respectively. Usually, this is the change from the Julian calendar to the Gregorian calendar as enacted in various European countries between 158 ...
References
{{Reflist
Gregorian calendar
Cultural history-related lists