This is what the calendar on your class website / edublog could look like. We’re using Google Calendar here because Google makes it so easy to add / change events, but there are lots of other WordPress Calendar plugins to choose from. (What’s a plugin?)
Click the down arrow on the top-right of the calendar (besides the Agenda link) to choose which calendars you want to display.
Read this post to find out how to add a Google Calendar to your class website / edublog.