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  2. Solar cycle (calendar) - Wikipedia

    en.wikipedia.org/wiki/Solar_cycle_(calendar)

    The solar cycle is a 28-year cycle of the Julian calendar, and 400-year cycle of the Gregorian calendar with respect to the week. It occurs because leap years occur every 4 years, typically observed by adding a day to the month of February, making it February 29th. There are 7 possible days to start a leap year, making a 28-year sequence. [1]

  3. Gregorian calendar - Wikipedia

    en.wikipedia.org/wiki/Gregorian_calendar

    The Gregorian calendar, like the Julian calendar, is a solar calendar with 12 months of 28–31 days each. The year in both calendars consists of 365 days, with a leap day being added to February in the leap years. The months and length of months in the Gregorian calendar are the same as for the Julian calendar.

  4. Conversion between Julian and Gregorian calendars - Wikipedia

    en.wikipedia.org/wiki/Conversion_between_Julian...

    The Gregorian calendar did not exist before October 15, 1582. Gregorian dates before that are proleptic, that is, using the Gregorian rules to reckon backward from October 15, 1582. Years are given in astronomical year numbering. Augustus corrected errors in the observance of leap years by omitting leap days until AD 8.

  5. Perpetual calendar - Wikipedia

    en.wikipedia.org/wiki/Perpetual_calendar

    A table for the Gregorian calendar expresses its 400-year grand cycle: 303 common years and 97 leap years total to 146,097 days, or exactly 20,871 weeks. This cycle breaks down into one 100-year period with 25 leap years, making 36,525 days, or one day less than 5,218 full weeks; and three 100-year periods with 24 leap years each, making 36,524 ...

  6. Qumran calendrical texts - Wikipedia

    en.wikipedia.org/wiki/Qumran_calendrical_texts

    The year and each of its quarters starts on the same day, the fourth day of the week (Wednesday to us). This was the day when the sun was created in Genesis 1:14–18. However, the calendar as we know it is 364 days long, making it one and a quarter days short of a true year.

  7. This Handy Chart Shows How to Pick the Perfect Pumpkin - AOL

    www.aol.com/heres-everything-needed-know-growing...

    How to Harvest Pumpkins. When it does come time to harvest your pumpkins, make sure you wear garden gloves as the vines are super prickly! You don't want to twist the pumpkin off the vine. Instead ...

  8. The Meaning Behind 13 Different Halloween Pumpkin ... - AOL

    www.aol.com/meaning-behind-13-different...

    4. Blue Pumpkin Meaning. iStock. As teal pumpkins signify a food allergy, blue pumpkins indicate autism. A house with a blue pumpkin outside could mean that a child in that house isn't ...

  9. Inter gravissimas - Wikipedia

    en.wikipedia.org/wiki/Inter_gravissimas

    Before this, France and Rome had used Victorius's less exact 457 translation of the Coptic calendar; Britain and Rome before Victorius had used Augustalis's 84-year cycle.) Gregory also made changes to the calendar rules, intending to ensure that, in the future, the equinox and the 14th day of the Paschal moon, and consequently Easter Sunday ...