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  2. Years of potential life lost - Wikipedia

    en.wikipedia.org/wiki/Years_of_potential_life_lost

    Reference age = 75; Age at death = 6 months; PYLL[75] = 75 − 0.5 = 74.5; Reference age = 75; Age at death = 80; PYLL[75] = 0 (age at death greater than reference age) To calculate the PYLL for a particular population in a particular year, the analyst sums the individual PYLLs for all individuals in that population who died in that year.

  3. 360-day calendar - Wikipedia

    en.wikipedia.org/wiki/360-day_calendar

    The 360-day calendar is a method of measuring durations used in financial markets, in computer models, in ancient literature, and in prophetic literary genres.. It is based on merging the three major calendar systems into one complex clock [citation needed], with the 360-day year derived from the average year of the lunar and the solar: (365.2425 (solar) + 354.3829 (lunar))/2 = 719.6254/2 ...

  4. Life expectancy - Wikipedia

    en.wikipedia.org/wiki/Life_expectancy

    Life expectancy, more technically called the curtate expected lifetime and denoted , [a] is the mean of —that is to say, the expected number of whole years of life remaining, assuming survival to age . [152] So, (2) Substituting ( 1) into the sum and simplifying gives the final result [153]

  5. Wikipedia:Age calculation templates - Wikipedia

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

    {{Age for infant}} – displays months and days up to one year, years and months up to three years, and years beyond {} Dates} {} – works with "fuzzy" or ambiguous dates {{Birth date and age}} – used on most biographical entries {{Birth date and age2}} – calculates age at a specified date

  6. How to Calculate Your Lucky Year, Month, and Day Using ... - AOL

    www.aol.com/calculate-lucky-month-day-using...

    Start by finding the year for which you hope to cast predictions and selecting the month that interests you. Add those numbers with your Destiny Number and reduce them until you have a single ...

  7. Determination of the day of the week - Wikipedia

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

    First determine the day-of-week d1 of 1 January. For a Gregorian calendar, the weekday is [5] Alternatively, set C = A \ 100, Y = A % 100, and the value is. For a Julian calendar, the weekday is or . Now determine the month-related offset m by using the lookup table with M. Return d = (d1 + m + D) % 7.

  8. Year-to-date - Wikipedia

    en.wikipedia.org/wiki/Year-to-date

    Contrast YTD with the concept of 12-months-ending (or Year-ending), which are more resistant to seasonal influences. Example: to calculate year-to-date Invoicing for a company, invoice totals for each previous month of the current year are added to total invoices for the current month to date. Example. Example: YTD Invoicing report for May 3

  9. Doomsday rule - Wikipedia

    en.wikipedia.org/wiki/Doomsday_rule

    The Doomsday rule, Doomsday algorithm or Doomsday method is an algorithm of determination of the day of the week for a given date. It provides a perpetual calendar because the Gregorian calendar moves in cycles of 400 years. The algorithm for mental calculation was devised by John Conway in 1973, [1] [2] drawing inspiration from Lewis Carroll ...