Membership.io does not have an in-house calendar feature. That said, you have a couple options when it comes to creating a seamless calendar experience for your members.
Option 1: Embed an external calendar into a Hub page
You have the option to bring in an external calendar by embedding a calendar in an iFrame element in a Hub page. You can also add a button with your calendar's subscribe link if your members want to sync your program's calendar with their own. Common calendars that can be embedded into Membership.io include AddEvent and Tockify.
Here's a visual example of what an embedded AddEvent calendar looks like inside of a Hub page:
Option 2: Create an "Updates" or "Live Events" space inside of your community
If you don't have a calendar product that you're currently using, you can create a space inside of your community forum to use for event announcements. By setting the posting permissions for that space to Hub Owner only, you can restrict the ability of your members posting in that space. This keeps your calendar space free from distractions and easy to navigate for members.
Here's a visual example of what a calendar-inspired space can look like inside of a Hub community:
