should be used only as private constructor to avoid one instance for every item on the personal dektop or in the repository Use ilDAVServer::getInstance()
Global ilFormat::fmtDateTime ($a_str, $a_dateformat, $a_timeformat, $a_mode="datetime", $a_relative=TRUE)
since 3.10 - 05.03.2009
Global ilFormat::formatDate ($a_date, $a_mode="datetime", $a_omit_seconds=false, $a_relative=TRUE)