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  2. Determination of the day of the week - Wikipedia

    en.wikipedia.org/wiki/Determination_of_the_day...

    For determination of the day of the week (1 January 2000, Saturday) the day of the month: 1 ~ 31 (1) the month: (6) the year: (0) the century mod 4 for the Gregorian calendar and mod 7 for the Julian calendar (0). adding 1+6+0+0=7. Dividing by 7 leaves a remainder of 0, so the day of the week is Saturday. The formula is w = (d + m + y + c) mod 7.

  3. Portal : United States/Anniversaries/February/February 13

    en.wikipedia.org/.../February/February_13

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate

  4. Gramps (software) - Wikipedia

    en.wikipedia.org/wiki/Gramps_(software)

    Gramps, formerly GRAMPS (an acronym for Genealogical Research and Analysis Management Programming System), [2] is a free and open-source genealogy software. [9] It is developed in Python using PyGObject and utilizes Graphviz to create relationship graphs. Gramps represents a form of commons-based peer production, [10] created by genealogists ...

  5. Dominical letter - Wikipedia

    en.wikipedia.org/wiki/Dominical_letter

    Thurston 1909 continues: . Now, as a moment's reflection shows, if 1 January is a Sunday, all the days marked by A will also be Sundays; if 1 January is a Saturday, Sunday will fall on 2 January, which is a B, and all the other days marked B will be Sundays; if 1 January is a Monday, then Sunday will not come until 7 January, a G, and all the days marked G will be Sundays ...

  6. This is a list of selected February 13 anniversaries that appear in the "On this day" section of the Main Page. To suggest a new item, in most cases, you can be bold and edit this page. Please read the selected anniversaries guidelines before making your edit.

  7. Genealogical numbering systems - Wikipedia

    en.wikipedia.org/wiki/Genealogical_numbering_systems

    The Henry System is a descending system created by Reginald Buchanan Henry for a genealogy of the families of the presidents of the United States that he wrote in 1935. [3] It can be organized either by generation or not. The system begins with 1. The oldest child becomes 11, the next child is 12, and so on.

  8. Here's when the holidays and special dates are in 2024

    www.aol.com/heres-holidays-special-dates-2024...

    St. Patrick's Day: Sunday, March 17 NYC Pride Parade: Sunday, June 30 This article originally appeared on NorthJersey.com: Holidays 2024: Here are the special days and dates

  9. Doomsday rule - Wikipedia

    en.wikipedia.org/wiki/Doomsday_rule

    For March, one can remember either Pi Day or "March 0", the latter referring to the day before March 1, i.e. the last day of February. For the months April through December, the even numbered months are covered by the double dates 4/4, 6/6, 8/8, 10/10, and 12/12, all of which fall on the doomsday.