@Mossop @0xabad1dea If I may add to the falsehoods:

1. DST doesn't exist
2. DST always exists
3. The dates that DST changes happen are the same everywhere
4. The dates that DST changes don't change
5. A person lives and works in the same time zone
6. A person's house is in a single time zone
7. A stationary object doesn't change timezones

I'm going to throw this one in just for good measure (though, to be fair, the story that goes with it wasn't about a programmer):
2.5: UTC experiences DST if the locale experiences DST.