Because we are so reliant on computers these days, and a lot of computer systems automatically change the clocks. Like it was mentioned, for things like airlines and other time based buisinesses, it could have a huge impact, and the effort to fix it would be substantial.CNF2002 wrote:
Why would it create more work? Just announce, "Hey, don't change your clocks anymore." Done
That said, they still need to make the change.