Academic quarter (class timing)

An academic quarter (German: Akademisches Viertel, Swedish: akademisk kvart (ak or aq) is the quarter-hour (15 minute) discrepancy between the defined start time for a lecture or lesson ("per schema") and the actual starting time, at some universities in Austria, Switzerland, Estonia, Finland, Romania, Belgium, Croatia, Slovenia, Germany, The Netherlands, Denmark, Norway, Portugal, Sweden, Serbia, Italy, Israel and the UK.