Predefined date/time formats -- see CustomDateTimeFormat if you need some format that isn't supplied here.
CustomDateTimeFormat
ISO 8601 date format, fixed across all locales.
Example: 2008-10-03T10:29:40.046-04:00
2008-10-03T10:29:40.046-04:00
http://code.google.com/p/google-web-toolkit/issues/detail?id=3068
http://www.iso.org/iso/support/faqs/faqs_widely_used_standards/widely_used_standards_other/date_and_time_format.htm
RFC 2822 date format, fixed across all locales.
Example: Thu, 20 May 2010 17:54:50 -0700
Thu, 20 May 2010 17:54:50 -0700
http://tools.ietf.org/html/rfc2822#section-3.3