Lots of things are logically timezone-unaware. E.g., I have an alarm that goes off at 6AM every day; it should do so whatever timezone I'm in. Or, some holiday

Lots of things are logically timezone-unaware. E.g., I have an alarm that goes off at 6AM every day; it should do so whatever timezone I'm in. Or, some holiday happens on the 14th of the month, not for a specific 24-hour period in a specific timezone. These aren't "TZ ambiguous". These are "this thing does not logically have a specific associated timezone". For things which do logically have a specific associated timezone, there's ZonedDateTime.