The Date droplet provides a way to quickly add a formatted dateto a page. The fastest way is to simply use two forward-slashes // as shortcut for opening the date picker widget.

This inserts the selected date in a badge style with a calendar icon:

Content droplet
If you forget the shortcut to add a date, you can also find it in the Content droplets menu by filtering for the "date" droplet.
Simple tasks
Dates can be used in combination with checklists and user-mentions to create tasks.