60mins offset is fine¹. We have this all the time with timezones. But imagine investigating and outage or scheduling an automated event when you have to make sure and communicate with non-technical folks that your graph / setting etc is off by 5:23 minutes.

The OP proposal does say UTC should be used when representing time to end users, but in practice there is going to be blurry lines.

¹TBH, still confusing enough to introduce quite a bit of friction when comparing graphs etc for outages.