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curl_getdate(3) 			  libcurl Manual			  curl_getdate(3)

NAME
       curl_getdate - Convert a date string to number of seconds since January 1, 1970

SYNOPSIS
       #include <curl/curl.h>

       time_t curl_getdate(char *datestring, time_t *now );

DESCRIPTION
       This  function  returns the number of seconds since January 1st 1970 in the UTC time zone,
       for the date and time that the datestring parameter specifies. The now  parameter  is  not
       used, pass a NULL there.

       NOTE: This function was rewritten for the 7.12.2 release and this documentation covers the
       functionality of the new one. The new one is not feature-complete with the  old	one,  but
       most of the formats supported by the new one was supported by the old too.

PARSING DATES AND TIMES
       A  "date"  is  a string containing several items separated by whitespace. The order of the
       items is immaterial.  A date string may contain many flavors of items:

       calendar date items
	       Can be specified several ways. Month names can only be three-letter english abbre-
	       viations,  numbers can be zero-prefixed and the year may use 2 or 4 digits.  Exam-
	       ples: 06 Nov 1994, 06-Nov-94 and Nov-94 6.

       time of the day items
	       This string specifies the time on a given day. You must specify it with	6  digits
	       with two colons: HH:MM:SS. To not include the time in a date string, will make the
	       function assume 00:00:00. Example: 18:19:21.

       time zone items
	       Specifies international time zone. There are a few acronyms supported, but in gen-
	       eral  you should instead use the specific relative time compared to UTC. Supported
	       formats include: -1200, MST, +0100.

       day of the week items
	       Specifies a day of the week. Days of the week may be spelled out  in  full  (using
	       english):  `Sunday', `Monday', etc or they may be abbreviated to their first three
	       letters. This is usually not info that adds anything.

       pure numbers
	       If a decimal number of the form YYYYMMDD appears, then YYYY is read as  the  year,
	       MM  as the month number and DD as the day of the month, for the specified calendar
	       date.

EXAMPLES
       Sun, 06 Nov 1994 08:49:37 GMT
       Sunday, 06-Nov-94 08:49:37 GMT
       Sun Nov	6 08:49:37 1994
       06 Nov 1994 08:49:37 GMT
       06-Nov-94 08:49:37 GMT
       Nov  6 08:49:37 1994
       06 Nov 1994 08:49:37
       06-Nov-94 08:49:37
       1994 Nov 6 08:49:37
       GMT 08:49:37 06-Nov-94 Sunday
       94 6 Nov 08:49:37
       1994 Nov 6
       06-Nov-94
       Sun Nov 6 94
       1994.Nov.6
       Sun/Nov/6/94/GMT
       Sun, 06 Nov 1994 08:49:37 CET
       06 Nov 1994 08:49:37 EST
       Sun, 12 Sep 2004 15:05:58 -0700
       Sat, 11 Sep 2004 21:32:11 +0200
       20040912 15:05:58 -0700
       20040911 +0200

STANDARDS
       This parser was written to handle date formats specified in RFC 822 (including the  update
       in  RFC	1123) using time zone name or time zone delta and RFC 850 (obsoleted by RFC 1036)
       and ANSI C's asctime() format. These formats are the only ones RFC2616 says HTTP  applica-
       tions may use.

RETURN VALUE
       This  function returns -1 when it fails to parse the date string. Otherwise it returns the
       number of seconds as described.

       If the year is larger than 2037 on systems with 32 bit time_t, this function  will  return
       0x7fffffff (since that is the largest possible signed 32 bit number).

       Having a 64 bit time_t is not a guarantee that dates beyond 03:14:07 UTC, January 19, 2038
       will work fine. On systems with a 64 bit time_t but with a crippled mktime(), curl_getdate
       will return -1 in this case.

REWRITE
       The  former  version  of this function was built with yacc and was not only very large, it
       was also never quite understood and it wasn't possible to build with non-GNU  tools  since
       only GNU Bison could make it thread-safe!

       The rewrite was done for 7.12.2. The new one is much smaller and uses simpler code.

libcurl 7.0				   12 Aug 2005				  curl_getdate(3)
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