function showSemWeekNumber($start_time){
$semester = Semester::FindByTimestamp($start_time);
if ($semester) {
echo htmlready($semester['name']) . ' - ';
$sem_week_number = $semester->getSemWeekNumber($start_time);
if(is_int($sem_week_number)){
printf(_("%s. Vorlesungswoche"), $sem_week_number);
} else {
echo _("vorlesungsfreie Zeit");
}
} else {
echo _("kein Semester verfügbar");
}
}
