Hi Aude,

You should be able to use:
{MERGEFIELD MyDate \@ "DDDD DD MMMM YYYY"} for the date; and
{MERGEFIELD MyTime \@ "hh:mm:ss"} for the time; or
{MERGEFIELD MyDateTime \@ "DDDD DD MMMM YYYY hh:mm:ss"} for the date & time.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]