формат даты в cookie

[Anton Yuzhaninov]

Модуль ngx_http_userid_module при выдаче кук использует устаревший формат даты, 
например:
expires=Thu, 31-Dec-37 23:55:55 GMT

Почему не используется такой формат?
expires=Sun, 31 Dec 2037 23:55:55 GMT
Такой формат не понимают какие то бразуеры? Если да, то какие?

В RFC по этому поводу написано
http://tools.ietf.org/html/rfc2616#section-3.3.1

Sun, 06 Nov 1994 08:49:37 GMT  ; RFC 822, updated by RFC 1123
Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
Sun Nov  6 08:49:37 1994       ; ANSI C's asctime() format

The first format is preferred as an Internet standard and represents
a fixed-length subset of that defined by RFC 1123 [8] (an update to
RFC 822 [9]). The second format is in common use, but is based on the
obsolete RFC 850 [12] date format and lacks a four-digit year.
HTTP/1.1 clients and servers that parse the date value MUST accept
all three formats (for compatibility with HTTP/1.0), though they MUST
only generate the RFC 1123 format for representing HTTP-date values
in header fields.

-- 
  Anton Yuzhaninov