The integrated marketing calendar we released a month ago has been hugely popular. One of the first enhancements we thought about (and many of you suggested it as well) was the ability to add events to it besides the ones that are automatically pulled in (list emails, webinars, Eventbrite events, and social posts). You can now do this by clicking the Create New Event button at the top right of the calendar. You will be able to name the event, choose the date(s) and time (optional), and add a URL that users are taken to if they click for details (optional). This can be to an events page (if you use a third party event vendor with which we do not integrate, a report in a third party system, etc. You can also choose an icon and background color to use on the calendar.
If your account has Custom Roles enabled, you can define who can view the calendar as well as who can edit and delete custom events from it. Note that users cannot delete events that are automatically pulled into it (email sends, webinars from attached connectors, etc.).