[dbrueck]

Would that it were so simple! For cronjobs, maybe it often is, but DST transitions are a mess to deal with in things like calendaring UIs and other places where you have to convert point-in-time values to the format consumed by normal people, and where your users can have different but legitimate expectations about how those transitions should be handled.

At one company I remember helping build a scheduling UI for a linear TV broadcast channel, where you plan out the broadcast day in 24h blocks. Worked great except twice a year when, due to DST, you have either a 23h day or a 25h day, and half a dozen ways various customers expected that to be handled. The de facto solution was to have happy customers 363 days a year. :-/

Hey, but thank goodness for https://en.wikipedia.org/wiki/Uniform_Time_Act or it would have been even worse!