All Day Busy Events on Fastmail not respecting timezone

I was troubleshooting some availability issues and noticed inconsistencies after reviewing busy, declined, and trashed events. To isolate the problem, I turned off all calendars and re-enabled them one at a time. I’ve now traced the issue to my Fastmail calendar.

It appears that an all-day event scheduled for the day after my intended availability is incorrectly marking part of the previous day—when I should be available—as busy. I’ve seen a similar issue before, where an all-day event on the same day didn’t block off the evening as expected.

Both Fastmail and YCBM are set to the same time zone, so I don’t believe this is a mismatch issue.

I am reaching out here for help and I have also reached out to Fastmail.

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@gabeanzelini thank you for reaching out. Testing my Fastmail, I can add an all day event and mark it as Busy, and it is showing correctly blocked on YCBM in real time


You can send me a direct message here (click my name and message) with a screen shot of your calendar(s) for the blocked availability. Keep in mind we are only showing when all of your calendars linked share Free time.

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I’m not sure what is going on with my tech skills but I can’t even find where to message you. Here is a screenshot. In addition to this I clicked through to your profile and searched for “message.”

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I just sent a message to support since I think that may have been the appropriate thing anyway.

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Odd you didn’t see the message button, maybe it is a time thing as you visited at 11:25 PM? I will send you a message.

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