How do I limit participation in section to a start and end date?

Once you have created a new section and added participants to the section, you can limit the participants interaction with the section to a start and end date.

Go to Settings

Select the Sections tab

Click on the name of the Section you want to limit participation

This displays all of the users that are associated with this section

Click Edit Section

Enter a Starts and Ends date/time, checkmark "Users can only participate between these dates", then click Update Section

This limits participation in the Section to the Starts and Ends dates

Example