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  2. Wikipedia:Age calculation templates - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Age_calculation...

    Wikipedia uses several templates that self-update every day to keep date and age information current. These are very useful for a dynamic online encyclopedia and save users from having to regularly update that kind of information. However, when using this kind of template, a few things should be kept in mind.

  3. Birthday problem - Wikipedia

    en.wikipedia.org/wiki/Birthday_problem

    The birthday paradox refers to the counterintuitive fact that only 23 people are needed for that probability to exceed 50%. The birthday paradox is a veridical paradox: it seems wrong at first glance but is, in fact, true. While it may seem surprising that only 23 individuals are required to reach a 50% probability of a shared birthday, this ...

  4. Leap Day birthday math: How old would you be if you were born ...

    www.aol.com/leap-day-birthday-math-old-024548677...

    Happy birthday! This year, Leap Day is Thursday, Feb. 29, 2024. If you were born on Leap Day 1924, you would be 100 years old or 25 in Leap Day years.

  5. Wikipedia:Reference desk/Science/Birthday probability ...

    en.wikipedia.org/.../Birthday_probability_question

    The correct answer, of course, is "infinite", as there is nothing preventing, for example, everyone from being born on the same day. But given the number of people, what is the probability of every day in the year being someone's birthday? For 1 to 364 people, it is 0, i.e. such a thing is impossible.

  6. Template:Birth year and age - Wikipedia

    en.wikipedia.org/wiki/Template:Birth_year_and_age

    that the person in question was born some time in 1970; and; that the present date is 30 January 2025. If the person was born after 30 January 1970 then they will be 54 years old on 30 January 2025 as they have not had their 55th birthday yet. On the other hand, if they were born exactly on or before 30 January 1970, then they will be 55 years old.

  7. Determination of the day of the week - Wikipedia

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

    Day-item: The total, thus reached, must be corrected, by deducting "1" (first adding 7, if the total be "0"), if the date be January or February in a leap year, remembering that every year, divisible by 4, is a Leap Year, excepting only the century-years, in 'New Style', when the number of centuries is not so divisible (e.g. 1800).

  8. October was once the 8th month of the year - AOL

    www.aol.com/october-once-8th-month-140342164.html

    Many know that the prefix oct- means eight, as in octopus or octagon. But why does October, the 10th month of the year, have this prefix?

  9. Doomsday rule - Wikipedia

    en.wikipedia.org/wiki/Doomsday_rule

    Next, find the year's anchor day. To accomplish that according to Conway: [11] Divide the year's last two digits (call this y) by 12 and let a be the floor of the quotient. Let b be the remainder of the same quotient. Divide that remainder by 4 and let c be the floor of the quotient. Let d be the sum of the three numbers (d = a + b + c). (It is ...