IMAP4 SEARCH question

[Laszlo Nagy]

Sorry, I found it:

date            = date-text / DQUOTE date-text DQUOTE
date-day        = 1*2DIGIT ; Day of month
date-day-fixed  = (SP DIGIT) / 2DIGIT ; Fixed-format version of date-day
date-month      = "Jan" / "Feb" / "Mar" / "Apr" / "May" / "Jun" /
                  "Jul" / "Aug" / "Sep" / "Oct" / "Nov" / "Dec"
date-text       = date-day "-" date-month "-" date-year



Is there a standard way to convert a datetime to this special, format or 
should I write my own function?