Add to calendar a repeat event first Thursday of the month on
I love the shared calendar but don't know how to add a repeat event which is ob the first Thursday of the month,
MacBook
On the particular appointment (or event), click on Repeat > Custom > Monthly > (you'll see a mini-calendar pop-up), then highlight the Thursday's and see if that works.
Alternatively, you could click on the radio button 'On The', then choose 'First', and from the drop-down, choose 'Thursday'.