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DateTime::Format::Epoch::JD 0.10

  Date Added: June 02, 2010  |  Visits: 773

DateTime::Format::Epoch::JD

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DateTime::Format::Epoch::JD is Perl module Convert DateTimes to/from Julian Days. SYNOPSIS use DateTime::Format::Epoch::JD; my $dt = DateTime::Format::Epoch::JD->parse_datetime( 2453244.5 ); # 2004-08-27T00:00:00 DateTime::Format::Epoch::JD->format_datetime($dt); # 2453244.5 my $formatter = DateTime::Format::Epoch::JD->new(); my $dt2 = $formatter->parse_datetime( 2453244.5 ); # 2004-08-27T00:00:00 $formatter->format_datetime($dt2); # 2453244.5 This module can convert a DateTime object (or any object that can be converted to a DateTime object) to the Julian Day number. This is the number of days since noon U.T.C. on January 1, 4713 B.C. (Julian calendar). This time scale was originally proposed by John Herschel, and is often used in astronomical calculations. Similar modules are: DateTime::Format::Epoch::MJD Implements the "modified Julian Day", starting at midnight U.T.C., November 17, 1858. This number is always 2,400,000.5 lower than the JD, and this count only uses five digits to specify a date between 1859 and about 2130. DateTime::Format::Epoch::RJD Implements the "reduced Julian Day", starting at noon U.T.C., November 16, 1858. This number is always 2,400,000 lower than the JD. DateTime::Format::Epoch::TJD Implements the "truncated Julian Day", starting at midnight U.T.C., May 24, 1968. This number is always 2,440,000,5 lower than the JD. Actually, there is another version of the TJD, defined as JD modulo 10,000. But that one is a bit harder to implement, so youll have to do with this version of TJD. Or dont use TJDs at all. DateTime::Format::Epoch::RataDie Implements the Rata Die count, starting at January 1, 1 (Gregorian). This count is used by DateTime::Calendar programmers. DateTime::Format::Epoch::Lilian Implements the Lilian count, named after Aloysius Lilian (a 16th century physician) and first used by IBM (a 19th century punched card machine manufacturer). This counts the number of days since the adoption of the Gregorian calendar. Only days are counted, and October 15, 1584 is day 1..

Requirements: No special requirements
Platforms: Linux
Keyword: Convert Convert Datetimes Datetime Datetimeformatepochjd Datetimes Day Implements Jd Julian Julian Day Module Number Perl Module Tjd
Users rating: 0/10

License: Freeware Size: 17.41 KB
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