Change the separator character in dates
SET MARK TO [<expC>]
The SET MARK TO command changes the separator character in dates to the character specified in expression <expC>. If character expression <expC> evaluates to more than one character, the SET MARK TO command only uses the first character in the string. The default separator in dates is determined by the setting of the SET DATE TO command. If the optional <expC> is not used, the date separator is set back to the default.
set mark to "." ? date() 05.05.2000