Julian

Julian-Gregorian Date Calculator makes more than simple date conversion among Gregorian and Julian Calendars. This tool is also used for adding and subtracting a number of days, weeks, months and years to or from a given date.

Convert a specified Julian Date Vector to Greenwich Mean Sidereal Time (GMST). The expected input matrix may contain multiple dimensions. The output matrix will be in the same size as the input matrix. Warning: Use caution when using GMST as a substitute for Greenwich Apparent Sidereal Time...

This utility can convert a gregorian date into julian day format/Modified Julian Day format and vice versa. The Julian Day Format counts the day since the 24th november -4713bc. The julian day format is often used in the astronomical section to calculate for example rises.


Platforms: Windows

A simple command to convert calendar dates to julian dates. Quite useful intiming situations where you need elapsed time between dates.Also useful for astronomy applications.


Platforms: Windows, Mac, Linux

DateTime::Format::Epoch::TJD is a Perl module that can convert DateTimes to/from Truncated Julian Days. SYNOPSIS use DateTime::Format::Epoch::TJD; my $dt = DateTime::Format::Epoch::TJD->parse_datetime( 13244.5 ); # 2004-08-27T00:00:00 DateTime::Format::Epoch::TJD->format_datetime($dt);...


Platforms: *nix

DateTime::Format::Epoch::RJD is a Perl module that can convert DateTimes to/from Reduced Julian Days. SYNOPSIS use DateTime::Format::Epoch::RJD; my $dt = DateTime::Format::Epoch::RJD->parse_datetime( 53244.5 ); # 2004-08-27T00:00:00 DateTime::Format::Epoch::RJD->format_datetime($dt); #...


Platforms: *nix

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...


Platforms: *nix

DateTime::Format::Epoch::MJD is a Perl module that can convert DateTimes to/from Modified Julian Days. SYNOPSIS use DateTime::Format::Epoch::MJD; my $dt = DateTime::Format::Epoch::MJD->parse_datetime( 53244 ); # 2004-08-27T00:00:00 DateTime::Format::Epoch::MJD->format_datetime($dt); #...


Platforms: *nix

Calendar formats include Gregorian, Thai, Julian, Persian, Islamic, Hebrew, Ethiopian, Coptic, Mayan and Taiwan.An AIR application is also included.


Platforms: JavaScript

A very simple module to help in writing down a date in Maya notation without having to know how to convert a Julian date to a Maya date.For detailed information: * Maya numerals (Wikipedia) * Maya calendar (Wikipedia) * World Calendars (In French, I'm afraid...)The module is capable of rendering...


Platforms: PHP

wxEuphoria is an implementation of wxWidgets (by Julian Smart, et. al.) for the Euphoria Programming Language. The wxWidgets library is compiled into a DLL or SO, and is linked to by Euphoria code, allowing cross platform development for Euphoria.


Platforms: *nix

InterCal is a date conversion program and perpetual calendar. It is not a personal appointment calendar.The program displays calendars, one month at a time, for any month of any year in any of nine implemented calendar systems. For each day, the corresponding date in any other system can be...


Platforms: Mac

As I could find no built-in function nor reliable contribution to achieve that, I had no choice but to write my own, leveraging the GregorianCalendar Java class.Usage is quite simple: targetDST = TimezoneConvert( dn, fromTimezone, toTimezone )The datenum dn corresponds to the datetime you want to...


Platforms: Matlab

Convert ECI (CIS, Epoch J2000.0) Coordinates to WGS 84 (CTS, ECEF) Coordinates. This function has been vectorized for speed.Example Function Call:>> [r_ECEF v_ECEF] = ECItoECEF(JD,r_ECI,v_ECI);Where:JD is the Julian Date vector [1 x N] (units are in days)r_ECI is the position vector [3 x N] (any...


Platforms: Matlab

moonpos calculates the moon position using the method in the bookAstronomical Algorithms by Jean Meeus, Chapter 45, pp 307 - 313. Thealgorithm used is accurate to about 10 arcsec in longitude and 4 arcsecin latitude according to the book, although the time range is notmentioned. The periodic...


Platforms: Matlab

Automatically adds keywords and description meta tag on every page based on title, tags, categories, etc.It works on the basis of defining some simple, tag-based rules for different page types (home, category, post etc).Built on the foundations of the excellent Automated Keywords Generator by...


Platforms: PHP

Date::ISO8601 - the three ISO 8601 numerical calendars The international standard ISO 8601 "Data elements and interchange formats - Information interchange - Representation of dates and times" defines three distinct calendars by which days can be labelled. It also defines textual formats for the...


Platforms: *nix

Time::UTC::Now is a Perl module to determine current time in UTC correctly. SYNOPSIS use Time::UTC::Now qw(now_utc_rat now_utc_sna now_utc_flt); ($day, $secs, $bound) = now_utc_rat; ($day, $secs, $bound) = now_utc_rat(1); ($day, $secs, $bound) = now_utc_sna; ($day, $secs, $bound) =...


Platforms: *nix

WJO Time is a simple application to tell the time using different time standards. Features - Local Time; Co-ordinated Universal Time; Julian Date - to nearest second; Apparent Sidereal Time; Mean Sidereal Time. The display can be configured to show any combination of times and when minimised will...


Platforms: Windows

DateTime::Format::Epoch::Lilian is a Perl module to convert DateTimes to/from Lilian Days. SYNOPSIS use DateTime::Format::Epoch::Lilian; my $dt = DateTime::Format::Epoch::Lilian->parse_datetime( 53244.5 ); # 2004-08-27T00:00:00 DateTime::Format::Epoch::Lilian->format_datetime($dt); #...


Platforms: *nix