My computer decided that Daylight Savings was supposed to end last night (or rather, this morning), when in actuality it doesn’t end until next Sunday morning.
I’m not sure if this is because of the Commonwealth Games, or whether it was just programmed in wrong.
Apparently this affects Windows, too.
I suspect 10.4.5 has an update to fix this. I’m getting it now, so in theory it should re-apply the change next weekend, although I’m not sure it will.
4 hours, 59 minutes after the fact.