[LK5ZJwMwgBbHuVI]

> Misconception #11: A country stays in the same time zone during Daylight Saving Time

In which he claims that DST must be a distinct timezone from standard time, followed shortly by

> Misconception #15: There is always an unambiguous conversion from one time zone to another

Which is absolutely true, if you treat DST as a distinct timezone.

Anyway... if you didn't already know 90% of these before starting, there are plenty of services that already do this very thing.

Oh, and how is punching a date and a timezone into Google Calendar too technical for her?