A complete timestamp should include a timezone, and a timezone is best defined with a geographic location. Example: you want to schedule events in Madrid, Spai

A complete timestamp should include a timezone, and a timezone is best defined with a geographic location. Example: you want to schedule events in Madrid, Spain and Warsaw, Poland. Currently they both use the CE(S)T timezone, but the EU is looking into abolishing summer time - which would lead to countries adopting their own timezones. At the moment "Europe/Madrid" and "Europe/Warsaw" are identical to CET/CEST, but that hasn't always been the case in the past and obviously there's no guarantee it'll always be the case in the future. If you stored those events as CE(S)T, what are you going to do when summer time gets abolished and Madrid ends up at +1:00 year-round but Warsaw at +3:00 year-round?