How do I extend the deadline/s for my program?

Settings > General > Program basics for registration and applications, Evaluation > Rounds for evaluation phase deadlines

You can set the deadlines for registration and/or program applications in Settings > General > Program basics.

If you wish to change a deadline for the evaluation phase of your program, you can do that by editing the Start date and End date fields which appear when you select Set dates in the Accepting votes dropdown menu for the corresponding evaluation round/s in Evaluation > Rounds.