DateTime::LeapSecond - leap seconds table and utilities


  use DateTime;
  use DateTime::LeapSecond;

  print "Leap seconds between years 1990 and 2000 are ";
  print Date::Leapsecond::leap_seconds( $utc_rd_2000 ) -
        Date::Leapsecond::leap_seconds( $utc_rd_1990 );


This module is used to calculate leap seconds for a given Rata Die day. It is used when cannot compile the XS version of this code.

This library is known to be accurate for dates until december 2003.

There are no leap seconds before 1972, because that's the year this system was implemented.

  • leap_seconds( $rd )

    Returns the number of accumulated leap seconds for a given day, in the range 0 .. 22.

  • extra_seconds( $rd )

    Returns the number of leap seconds for a given day, in the range -2 .. 2.

  • day_length( $rd )

    Returns the number of seconds for a given day, in the range 86398 .. 86402.


Flávio Soibelmann Glock, <>


Copyright (c) 2003 Flávio Soibelmann Glock. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

The full text of the license can be found in the LICENSE file included with this module.



1 POD Error

The following errors were encountered while parsing the POD:

Around line 161:

Non-ASCII character seen before =encoding in 'Flávio'. Assuming ISO8859-1