macOS High Sierra Calendar notifications appear but have the wrong event time I have a (recurring) meeting notice in my calendar.  On my iPhone and on macOS I get the (half-an-hour before) alert, but they display differently!  On my iPhone it is displayed as "Meeting notice ..... in 30 min", but on macOS it appears as "Meeting notice ..... now".

It appears that the notifications on macOS tell me when the alert is raised and not when the meeting is to be.  This is extremely confusing, and I think a bug.

Subsequently, the alert on the iPhone counts down to the meeting time, but the notification on macOS says things like "Meeting notice ..... 14m ago". If I get another alert (second alert say ten minutes before) this overwrites the notification in the notifications panel and the time is reset to "now".

Is this a bug?
This issue has been driving me crazy so I called Apple. After a lengthy discussion and sharing my screen with AppleCare, support said they hadn't seen this before. They submitted a ticket to engineering and I'm waiting to hear back. I'll post an update when I do.