Up to 2001, the timetable year started at the end of May. From 2002, the European Timetable Conference set the annual working timetable to change in mid-December - approximating the calendar year more closely. The European Commission declared this date generally valid in its Decision 2002/844/EC (document number C(2002) 3997). In Switzerland, the Federal Office of Transport (FOT) is responsible for setting the timetable year. Because transport is interwoven internationally, and in application of the Land Transport Agreement, Switzerland has taken on the EU arrangements.
The timetable is set to change at midnight on the second Saturday in December. This is 8.12 at the earliest and 14.12 at the latest. The following Sunday, i.e. the first day on which the new timetable is valid, is thus always 9.12 at the earliest or 15.12 at the latest.
The first day on which the new timetable is valid is the Sunday following its introduction: