The calendar widget creates a calendar in your sidebar with clickable links to your posts for particular dates. Dates that appear in bold type indicate dates you’ve published posts.
It doesn’t let you setup a calendar of events. It’s only used is to display links to your posts by date.
Refer to our Google Calendar support page if you would like to add an events calendar.
Here’s what it looks like when it’s added to a sidebar:
Settings
Once you add the widget to your sidebar in Appearance > Widgets, you’ll see that the widget settings look like this:
The only option you have is to add your own custom title.