parse_datetime( CW$str [, CW$zone] )
The parse_datetime() function converts a string to machine time. It throws
an error if the format of $str is unrecognized, or the time is outside
the representable range. The time formats recognized are listed below.
The function also takes an optional second argument that specifies the
default time zone to use when converting the date. This parameter is
ignored if the zone is found in the date string itself. If this
parameter is missing, and the date string format does not contain
any zone specification, then the floating time zone is used.
The zone should be one that is recognized by DateTime::TimeZone.
Actual parsing is done with the HTTP::Date module. At the time of
writing it supports the formats listed next. Consult that modules
documentation in case the list has been changed.
"Wed, 09 Feb 1994 22:23:32 GMT" -- HTTP format
"Thu Feb 3 17:03:55 GMT 1994" -- ctime(3) format
"Thu Feb 3 00:00:00 1994", -- ANSI C asctime() format
"Tuesday, 08-Feb-94 14:15:29 GMT" -- old rfc850 HTTP format
"Tuesday, 08-Feb-1994 14:15:29 GMT" -- broken rfc850 HTTP format
"03/Feb/1994:17:03:55 -0700" -- common logfile format
"09 Feb 1994 22:23:32 GMT" -- HTTP format (no weekday)
"08-Feb-94 14:15:29 GMT" -- rfc850 format (no weekday)
"08-Feb-1994 14:15:29 GMT" -- broken rfc850 format (no weekday)
"1994-02-03 14:15:29 -0100" -- ISO 8601 format
"1994-02-03 14:15:29" -- zone is optional
"1994-02-03" -- only date
"1994-02-03T14:15:29" -- Use T as separator
"19940203T141529Z" -- ISO 8601 compact format
"19940203" -- only date
"08-Feb-94" -- old rfc850 HTTP format (no weekday, no time)
"08-Feb-1994" -- broken rfc850 HTTP format (no weekday, no time)
"09 Feb 1994" -- proposed new HTTP format (no weekday, no time)
"03/Feb/1994" -- common logfile format (no time, no offset)
"Feb 3 1994" -- Unix ls -l format
"Feb 3 17:03" -- Unix ls -l format
"11-15-96 03:52PM" -- Windows dir format
The parser ignores leading and trailing whitespace. It also allow the
seconds to be missing and the month to be numerical in most formats.
If the year is missing, then we assume that the date is the first
matching date before current month. If the year is given with only
2 digits, then parse_date() will select the century that makes the
year closest to the current date.
The format_datetime() method converts a DateTime to a string. If
the function is called without an argument, it will use the current
The string returned is in the format preferred for the HTTP protocol.
This is a fixed length subset of the format defined by RFC 1123,
represented in Universal Time (GMT). An example of a time stamp
in this format is:
Sun, 06 Nov 1994 08:49:37 GMT
Copyright Iain Truskett, 2003. All rights reserved.
Sections of the documentation Gisle Aas, 1995-1999.
Changes since version 0.35 copyright David Rolsky, 2004.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.000 or,
at your option, any later version of Perl 5 you may have available.
The full text of the licences can be found in the Artistic and
COPYING files included with this module, or in perlartistic and
perlgpl as supplied with Perl 5.8.1 and later.