Public Calendars and Resources #inSalesforce

Use public calendars to manage department or project schedules. Use resource calendars to manage resources such as conference rooms and projectors.

For Example: This is to track a group’s events, such as marketing events, product releases, or training classes, or schedule a common activity, such as a team vacation and resource calender to schedule the use of a shared resource, such as a conference room or an overhead projector.

Steps:

Setup | select Public Calendars and Resources | New | Name it and select Active | Sharing and share as per need | Provide the access as per need.

Just make sure that users have the appropriate permissions. For example, an event invitee who doesn’t have 'Read' permission on opportunities can’t view the opportunity associated with the event.

Reference: https://help.salesforce.com/s/articleView?id=sf.customize_groupcal.htm&type=5