Invite who you want in group calendars

Ethan LiHi Ethan, my company is very new to 365. I am the admin, and have been asked to manage a company calendar showing scheduled vacation days. I set up a group calendar. Is there any way I can send out an email as an announcement, not as an invite, each time I add a new entry to the calendar? I just need to email a notice to each member; I do not need a reply.

Thanks for any insights. -Rob Schimmel