How to add a calendar item to a group calendar in Office365 without notifying group memebers

Hi

We have a group in office365 where users view that shared calendar in that group.

We want to use it as a calendar to update all events, birthdays etc for their reference.

But we are unable to add any event without notifying all the members in the group.

Can you tell me how to add a calendar item in the group shared calendar (in office365) without sending email notifications to all its members?

Thank you

Regards,

Bhagya