How can I change my order's delivery window?

You can change your delivery window until your order cutoff time (cutoff visible under your Order Details).

On goodeggs.com, go to Your Orders page.  Click on Order Details > for your active order.  On the next page, click the Change button in the Delivery Time section.

In the Good Eggs iOS app, click on the Market tab at the left bottom corner.  You'll see a green banner for your upcoming delivery. Click on this banner and then click Edit Order on the next page.  Tap directly on the current delay window and edit your delivery window from there.