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Year-to-date (YTD) is a period, starting from the beginning of the current year (either the calendar year or fiscal year) and continuing up to the present day. Overview
Conversion between Julian and Gregorian calendars. The tables below list equivalent dates in the Julian and Gregorian calendars. Years are given in astronomical year numbering . This is a visual example of the official date change from the Julian calendar to the Gregorian.
A 50-year "pocket calendar" that is adjusted by turning the dial to place the name of the month under the current year. One can then deduce the day of the week or the date. A perpetual calendar is a calendar valid for many years, usually designed to look up the day of the week for a given date in the past or future.
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 ...
Converting Julian calendar date to Julian Day Number. Finding Julian date given Julian day number and time of day. Finding day of week given Julian day number. Julian or Gregorian calendar from Julian day number. Julian Period from indiction, Metonic and solar cycles. Julian date 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 ยง Julian day number calculation within that article for details ...
The International Fixed Calendar divides the year into 13 months of 28 days each. A type of perennial calendar, every date is fixed to the same weekday every year. Though it was never officially adopted at the country level, the entrepreneur George Eastman instituted its use at the Eastman Kodak Company in 1928, where it was used until 1989. [2]
In [ Astronomical Algorithms ], the 'B.C.' years are counted astronomically. Thus, the year before the year +1 is the year zero, and the year preceding the latter is the year โ1. The year which historians call 585 B.C. is actually the year โ584. The astronomical counting of the negative years is the only one suitable for arithmetical purpose.
The Gregorian calendar, like the Julian calendar, is a solar calendar with 12 months of 28โ31 days each. The year in both calendars consists of 365 days, with a leap day being added to February in the leap years. The months and length of months in the Gregorian calendar are the same as for the Julian calendar.
Calendar year. A calendar year is an approximation of the number of days of the Earth's orbital period, as counted in a given calendar. The Gregorian calendar, or modern calendar, presents its calendar year to be either a common year of 365 days or a leap year of 366 days, as do the Julian calendars.