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Almost 2.5 million days have transpired since this date.
Julian dates are widely used as time variables within astronomical software.
The omission of ten days of calendar dates was necessitated by the astronomical error built up by the Julian calendar over its many centuries of use, due to its too-frequent leap years.
The changeover to the Gregorian calendar system occurred as described above only in Roman Catholic countries.
For example, March 3 would be V Nones—5 days before the Nones (the Roman method of counting days was inclusive; in other words, the Nones would be counted as one of the 5 days).The soothsayer's warning to Julius Caesar, "Beware the Ides of March," has forever imbued that date with a sense of foreboding.But in Roman times the expression "Ides of March" did not necessarily evoke a dark mood—it was simply the standard way of saying "March 15." Surely such a fanciful expression must signify something more than merely another day of the year? Even in Shakespeare's time, sixteen centuries later, audiences attending his play Julius Caesar wouldn't have blinked twice upon hearing the date called the Ides.(The Unix cal command for systems manufactured in the U. reflects the 1752 changeover.) For a list of when certain countries switched to the Gregorian calendar, see Claus Tøndering's Calendar FAQ. For more information on the API, please see the documentation page. For further information on calendars, see Richards, E.
Typically, a 64-bit floating point (double precision) variable can represent an epoch expressed as a Julian date to about 1 millisecond precision.