If you mean "changing time in summer", Chile has been doing this for a while, and I think other countries in South America do to.
If you mean "changing the rules a few hours / days before they should be applied", Chile (again) did this a few years / decades ago, and it wreaked havoc: all scheduled meetings were off by one or two hours, you could not rely on your calendar, etc.
Plenty of stupidity going around in Chile / South America, rest assured.
If you mean "changing the rules a few hours / days before they should be applied", Chile (again) did this a few years / decades ago, and it wreaked havoc: all scheduled meetings were off by one or two hours, you could not rely on your calendar, etc.
Plenty of stupidity going around in Chile / South America, rest assured.