In UI cases like this, I usually wish tech would err on the side of being transparent and predictable rather than trying to be smart. For example, if my alarm h

In UI cases like this, I usually wish tech would err on the side of being transparent and predictable rather than trying to be smart. For example, if my alarm has been set to 10:00 (with no attached time zone), it should go off when the clock face reaches 10:00. I think python3's datetime has something like what you're pointing at -- objects are either timezone-aware or not. My complaint probably has to do with trying to hide this distinction from the user, when it would be more helpful to make it clear.