DST time change for global companies

We are curious to hear how other companies are handling the DST time changes in spring and fall especially if they are global and operating in multiple time zones.

Do you set servers to UTC/GMT?

And set SAP systems to UTC?

And let users set their local time zone?

Would that mean we don't have to worry about the fall and spring time change any more because UTC doesn't change? (That would be nice!)

TIA,

Margie