Dec 7, 2018 - 1:03 AM
in reply to JPAR
European Train timetables changes once a year in early December.
Main line Swiss train timetables stay the same throughout the year - unless there is engineering work
on the track. Apart from that there may be very minor differences between levels of service (for example on a few lines there are trains that run Monday - Friday only because they are aimed at commuters)
There are a few mountain tourist lines that are summer only (such as Schynige Platte)