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  2. Old Style and New Style dates - Wikipedia

    en.wikipedia.org/wiki/Old_Style_and_New_Style_dates

    The issue spans the changeover; the date heading reads: "From Tuesday September 1, O.S. to Saturday September 16, N.S. 1752". [1] Old Style (O.S.) and New Style (N.S.) indicate dating systems before and after a calendar change, respectively. Usually, they refer to the change from the Julian calendar to the Gregorian calendar as enacted in ...

  3. Decimal Day - Wikipedia

    en.wikipedia.org/wiki/Decimal_Day

    An old value of 7 pounds, 10 shillings, and sixpence, abbreviated £7-10-6 or £7:10s:6d. became £7.52 ⁠ 1 / 2 ⁠ p. Amounts with a number of old pence which was not 0 or 6 did not convert into a round number of new pence. The Irish pound had the same £sd currency structure, and the same decimalisation was carried out.

  4. French Republican calendar - Wikipedia

    en.wikipedia.org/wiki/French_Republican_calendar

    French Republican Calendar of 1794, drawn by Philibert-Louis Debucourt. The French Republican calendar (French: calendrier républicain français), also commonly called the French Revolutionary calendar (calendrier révolutionnaire français), was a calendar created and implemented during the French Revolution, and used by the French government for about 12 years from late 1793 to 1805, and ...

  5. Indian anna - Wikipedia

    en.wikipedia.org/wiki/Indian_anna

    An anna (or ānna) was a currency unit formerly used in British India, equal to 16 of a rupee. [1] It was subdivided into four pices or twelve pies (thus there were 192 pies in a rupee). When the rupee was decimalised and subdivided into 100 (new) paise, one anna was therefore equivalent to 6.25 paise. The anna was demonetised as a currency ...

  6. Conversion between Julian and Gregorian calendars - Wikipedia

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

    No guidance is provided about conversion of dates before March 5, -500, or after February 29, 2100 (both being Julian dates). For unlisted dates, find the date in the table closest to, but earlier than, the date to be converted. Be sure to use the correct column. If converting from Julian to Gregorian, add the number from the "Difference" column.

  7. Dual dating - Wikipedia

    en.wikipedia.org/wiki/Dual_dating

    Dual dating is the practice, in historical materials, of indicating a date with what appear to be duplicate or excessive digits: these may be separated by a hyphen or a slash, or placed one above the other. The need for dual dating arose from the transition from an older calendar to a newer one. Another method used is to give the date of an ...

  8. Wikipedia:Manual of Style/Dates and numbers - Wikipedia

    en.wikipedia.org/.../Dates_and_numbers

    Hours under 10 should have a leading zero (08:15). The time 00:00 refers to midnight at the start of a date, 12:00 to noon, and 24:00 to midnight at the end of a date, but 24 should not be used for the first hour of the next day (e.g. use 00:10 for ten minutes after midnight, not 24:10).

  9. History of money - Wikipedia

    en.wikipedia.org/wiki/History_of_money

    The history of money is the development over time of systems for the exchange, storage, and measurement of wealth. Money is a means of fulfilling these functions indirectly and in general rather than directly, as with barter. Money may take a physical form as in coins and notes, or may exist as a written or electronic account.