[stickfigure]

It doesn't need to come up "a lot" for your application to feel buggy. It just needs to come up.

Your UI has a selector for Date/Time and a selector for Location. They might even be different screens. The Location may have been prefilled with a guess based on geoip. Or maybe they saved the wrong 'Springfield'.

The user took an action to change Location. If that has the side effect of changing Time, the user will be surprised.