How to disable LinkedIn birthday event notification in mac calendar? I have a lot of connections in LinkedIn and due to this every time when I open my laptop I got notification about there birthday. 

My calendar looks like this



It is very inconvenient, how knows how to disable these events or discard linkedIn from calendar?
The only way I found was to disable LinkedIn in your Contacts "Preferences > Accounts".  That is how I could prevent them from showing in my Calendar.

I highly recommend you to send feedback to Apple about this.