We've asked Google for comment, although the bug didn't appear to affect iOS or other platforms.

While the glitch seems to have been resolved, its timing isn't exactly ideal. Google just showcased the next wave of Assistant technology at CES -- it's not exactly confidence-inspiring when a function like this stops working. Think of it as a not-so-subtle warning that you shouldn't rely solely on cloud services to remind you about a vital appointment, no matter how reliable the service normally is.