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The calendar year can be divided into four quarters, often abbreviated as Q1, Q2, Q3, and Q4. Since they are three months each, they are also called trimesters. In the Gregorian calendar : First quarter, Q1: January – March (90 days or 91 days in leap years) Second quarter, Q2: April – June (91 days) Third quarter, Q3: July – September ...
- Year - Wikipedia
Calendar year. A calendar year is an approximation of the...
- Gregorian calendar - Wikipedia
The Gregorian calendar, like the Julian calendar, is a solar...
- Calendar - Wikipedia
A calendar is a system of organizing days. This is done by...
- Year - Wikipedia
Months. The months of the Gregorian calendar year are, in order: If February has 28 days, then the year is 365 days long. If February has 29 days, then the year is called a leap year and it is 366 days long. A leap year usually happens once every four years. The most recent leap year was 2024, and the next leap year is 2028.
In 2013, archaeologists unearthed ancient evidence of a 10,000-year-old calendar system in Warren Field, Aberdeenshire. This calendar is the next earliest, or "the first Scottish calendar". The Sumerian calendar was the next earliest, followed by the Egyptian, Assyrian and Elamite calendars. The Vikram Samvat has been used by Hindus and Sikhs.
Based on the reforms introduced by Numa Pompilius in c. 713 BC . Six classical (Zhou era) calendars: Huangdi, Zhuanxu, Xia, Yin, Zhou's calendar and Lu. The Nisga’a calendar revolves around harvesting of foods and goods used. The original year followed the various moons throughout the year.
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