Christian liturgy is a pattern for worship used (whether recommended or prescribed) by a Christian congregation or denomination on a regular basis. Although the term liturgy is used to mean public worship in general, the Byzantine Rite uses the term "Divine liturgy" to denote the ...
The Maya calendar is a system of calendars used in pre-Columbian Mesoamerica, and in many modern communities in highland Guatemala and in Veracruz, Oaxaca and Chiapas, Mexico. The essentials of the Maya calendar are based upon a system which had been in common use throughout the region. It shares ...
A lunar calendar is a calendar that is based on cycles of the lunar phases. Because there are slightly more than twelve lunations in a solar year, the period of 12 lunar months (354.37 days) is sometimes referred to as a lunar year. A common purely lunar calendar is the Islamic calendar or Hijri ...
The Islamic calendar is a lunar calendar consisting of 12 months in a year of 354 or 355 days. It is used to date events in many Muslim countries, and used by Muslims everywhere to determine the proper days on which to observe the annual fast, to attend Hajj, and to celebrate other Islamic ...
The Hebrew or Jewish calendar is a lunisolar calendar used today predominantly for Jewish religious observances. It determines the dates for Jewish holidays and the appropriate public reading of Torah portions, yahrzeits, and daily Psalm readings, among many ceremonial uses. In Israel, it is used ...
The Julian calendar was a reform of the Roman calendar. It was the predominant calendar in most of Europe, and in European settlements in the Americas and elsewhere, until it was refined and superseded by the Gregorian calendar. The difference in the average length of the year between Julian ...
The Gregorian calendar is internationally the most widely used civil calendar. It has been the unofficial global standard for decades, recognised by international institutions such as the United Nations and the Universal Postal Union.
A calendar is a system of organizing days for social, religious, commercial or administrative purposes. This is done by giving names to periods of time, typically days, weeks, months, and years. A date is the designation of a single, specific day within such a system. Periods in a calendar are ...
