Log In to your Kinema account.
Click on your initials, in the upper right hand corner
Select Dashboard
Select the correct Organization Name in the left nav if you have multiple organizations
Click 'edit' to the right of the film title for which you would like to edit your availability dates.
Select Rights in the left nav, then adjust 'Screening Event Window' at the bottom of your screen.
Click Save
On your live Film Page, you will see when the film is available until: