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  2. Yusnier Viera - Wikipedia

    en.wikipedia.org/wiki/Yusnier_Viera

    Yusnier Viera (born April 26, 1982) is a Cuban American mental calculator. He is well known as "The Human Calendar" for his world record on calendar dates. [1] On October 31, 2005 he broke for first time the World Record for calendar calculations. At the Mental Calculation World Cup in 2010 he won the calendar category. His current record for ...

  3. Doomsday rule - Wikipedia

    en.wikipedia.org/wiki/Doomsday_rule

    In order to correct for calendar drift, 10 days were skipped, so doomsday moved back 10 days (i.e. 3 days): Thursday, October 4 (Julian, doomsday is Wednesday) was followed by Friday, October 15 (Gregorian, doomsday is Sunday). The table includes Julian calendar years, but the algorithm is for the Gregorian and proleptic Gregorian calendar only.

  4. Calendrical calculation - Wikipedia

    en.wikipedia.org/wiki/Calendrical_calculation

    A calendrical calculation is a calculation concerning calendar dates. Calendrical calculations can be considered an area of applied mathematics. Some examples of calendrical calculations: Converting a Julian or Gregorian calendar date to its Julian day number and vice versa (see § Julian day number calculation within that article for details).

  5. Substitution (sport) - Wikipedia

    en.wikipedia.org/wiki/Substitution_(sport)

    However, both the American Ultimate Disc League and Premier Ultimate League further allow teams to make unlimited substitutions during time-outs as well. Water polo: Water polo permits an unlimited number of substitutions, however, per FINA rules, rolling substitution during live play is only allowed in Olympic competitions. For all other ...

  6. Determination of the day of the week - Wikipedia

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

    The basic approach of nearly all of the methods to calculate the day of the week begins by starting from an "anchor date": a known pair (such as 1 January 1800 as a Wednesday), determining the number of days between the known day and the day that you are trying to determine, and using arithmetic modulo 7 to find a new numerical day of the week.

  7. Scott Flansburg - Wikipedia

    en.wikipedia.org/wiki/Scott_Flansburg

    Scott Flansburg (born December 28, 1963) is an American dubbed "The Human Calculator" and listed in the Guinness Book of World Records for speed of mental calculation.He is the annual host and ambassador for The National Counting Bee, a math educator, and media personality.

  8. 4–4–5 calendar - Wikipedia

    en.wikipedia.org/wiki/4–4–5_calendar

    The 4–4–5 calendar is a method of managing accounting periods, and is a common calendar structure for some industries such as retail and manufacturing.It divides a year into four quarters of 13 weeks, each grouped into two 4-week "months" and one 5-week "month".

  9. 2011 Ohio Issue 2 - Wikipedia

    en.wikipedia.org/wiki/2011_Ohio_Issue_2

    The Ohio Collective Bargaining Limit Repeal appeared on the November 8, 2011 general election ballot in the state of Ohio as a veto referendum.Senate Bill 5 (SB5) was repealed by Ohio voters after a campaign by firefighters, police officers and teachers against the measure, [1] which would have limited collective bargaining for public employees in the state.