go to embeds, capsesoft objects, and find SaveCurrentFieldToXml(SaveCurrentFieldToXML   PROCEDURE (Long p_x,Long p_DimCounter,String p_name) and then
if p_name = 'autm_aika_date'
    self.FormatCurrentField('@d02')   <--- your format
END
if p_name = 'autm_aika_time'
    self.FormatCurrentField('@t06')   <--- your format
END