Static Function ToRFC822 ( Date As Date [ , TimeZone As String ] ) As String
Convert a date to its RFC 822 representation.
Date : The date to convert.
TimeZone : The RFC 822 timezone of the date. By default it's "GMT".
"GMT"
Date.FromRFC822
https://www.ietf.org/rfc/rfc822.txt, chapter 5.