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A month is a unit of time, used with calendars, that is approximately as long as a natural orbital period of the Moon; the words month and Moon are cognates.The traditional concept of months arose with the cycle of Moon phases; such lunar months ("lunations") are synodic months and last approximately 29.53 days, making for roughly 12.37 such months in one Earth year.
This is a list of calendars.Included are historical calendars as well as proposed ones. Historical calendars are often grouped into larger categories by cultural sphere or historical period; thus O'Neil (1976) distinguishes the groupings Egyptian calendars (Ancient Egypt), Babylonian calendars (Ancient Mesopotamia), Indian calendars (Hindu and Buddhist traditions of the Indian subcontinent ...
A lunar calendar is a calendar based on the monthly cycles of the Moon 's phases ( synodic months, lunations ), in contrast to solar calendars, whose annual cycles are based on the solar year. The most widely observed purely lunar calendar is the Islamic calendar. [ a] A purely lunar calendar is distinguished from a lunisolar calendar, whose ...
June. African-American Music Appreciation Month [ 28][ 29] ALS Awareness Month (Canada) Caribbean-American Heritage Month [ 30] LGBT Pride Month. National PTSD Awareness Day [ 31] National Safety Month [ 32] National Smile Month (United Kingdom, May and June) Devotion to the Sacred Heart.
Just like months, the Hindu calendar has two measures of a day, one based on the lunar movement and the other on solar. The solar day or civil day, called divasa (दिवस), has been what most Hindus traditionally use, is easy and empirical to observe, with or without a clock, and it is defined as the period from one sunrise to another.
The Babylonian civil calendar, also called the cultic calendar, was a lunisolar calendar descended from the Nippur calendar, which has evidence of use as early as 2600 BCE and descended from the even older Third Dynasty of Ur (Ur III) calendar. The original Sumerian names of the months are seen in the orthography for the next couple millennia ...
The months of the Tamil calendar. The Tamil calendar (தமிழ் நாட்காட்டி) is a sidereal solar calendar used by the Tamil people of the Indian subcontinent. [ 1][ 2] It is also used in Puducherry, and by the Tamil population in Sri Lanka, Malaysia, Singapore, Myanmar and Mauritius. It is used in contemporary times for ...
Saint Stephen's Day or Second Day of Christmas (26 December) – Holiday observed in many European countries. Boxing Day (26 December or 27 December) – Holiday observed in many Commonwealth countries on the first non-Sunday after Christmas. New Year's Eve (31 December) – Night before New Year's Day.