In 400 years we can define new 30 minutes shifted timezones and in 400 - 500 years governments can slowly change their official timezones (maybe at summer/wint

In 400 years we can define new 30 minutes shifted timezones and in 400 - 500 years governments can slowly change their official timezones (maybe at summer/winter time they shift 30 minutes instead of 60). It does not feel like a big issue.