How much time in advance do you tell work when you need a day off?

I have two jobs. One job told me we have a meeting in required to attend (it’s once a month) but they only gave me a couple day notice. I was already scheduled at my other job during that time and I asked my boss if I could have an hour off and she said too many people called out sick for this week cause they have Covid so I’ll need to stay for the full day. I told my boss from my other job I won’t be able to attend the meeting.

But now I’m kinda anxious I’ll miss out what was said during the meeting, and also a little anxious that I wasn’t able to take an hour off.

How should I be feeling?