The HTTPS Adapter checks time-limited cookies with expiration dates to ensure that they have not expired. If they have expired, the cookie is removed and is not resent to the originating server. As a result, the session state is removed.
The following standard expiration date formats are recognized by the HTTPS Adapter:
| "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 "Sunday, 06-Nov-1994 08:49:37 GMT" ;RFC 1036 "Sun Nov 6 08:49:37 1994" ;ANSI C’s asctime() | 
If the expiration date is in another format, the Adapter does not recognize the expiration date. Instead, it treats the cookie as if it does not have an expiration date.