Changing the Expiration Date of the Submission Invitation
The submission deadline set through the venue request form is actually only the advertised due date. The true deadline is the expiration date, which is set to 30 minutes after the submission deadline. If you would like to change the expiration date to allow the authors more or less wiggle room around the submission deadline, you can do so using the python client.
Depending on the API version that your venue is using, you will need to update the expdate value differently.
Retrieve your invitation:
Set the expiration date, or expdate.
Create an Invitation Edit