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The cross-quarter days are four holidays falling in between the quarter days: Candlemas (2 February), May Day (1 May), Lammas (1 August), and All Hallows (1 November). At many schools, class terms would begin on the quarter days; for example, the autumn term would start on 29 September, and thus continues to be called the Michaelmas term ...
[a] The astronomer's mean tropical year, which is averaged over equinoxes and solstices, is currently 365.24219 days, slightly shorter than the average length of the calendar year in most calendars. A year can also be measured by starting on any other named day of the calendar, and ending on the day before this named day in the following year. [2]
Timeline of history of environmentalism (630s – present) Weather and environmental disasters. ... Timeline for the day of the September 11 attacks (11 September 2001)
Timelines of world history; List of timelines; Chronology; See calendar and list of calendars for other groupings of years. See history, history by period, and periodization for different organizations of historical events. For earlier time periods, see Timeline of the Big Bang, Geologic time scale, Timeline of evolution, and Logarithmic timeline
In the Great Depression, GDP fell by 27% (the deepest after demobilization is the recession beginning in December 2007, during which GDP had fallen 5.1% by the second quarter of 2009) and the unemployment rate reached 24.9% (the highest since was the 10.8% rate reached during the 1981–1982 recession). [40]
February 8: A Day for Scientific Breakthroughs. On February 8, nearly 200 years apart, two groundbreaking scientific papers were unveiled that dramatically reshaped our comprehension of the world.
History portal; Art of Europe; Geologic time scale; List of fossil sites with link directory. List of timelines around the world. Logarithmic timeline shows all history on one page in ten lines. Orders of magnitude (time) Periodization for a discussion of the tendency to try to fit history into non-overlapping periods. Time. Planck Time
In addition to the quarter and cross-quarter days, other festivals may also be celebrated throughout the year, especially in the context of polytheistic reconstructionism and other ethnic traditions. While festivals of the Wheel are steeped in solar mythology and symbolism , many Wiccan esbats are commonly based on lunar cycles .