For whatever reason you are forced to now change the dates of your upcoming event, but you've taken the time to build out your event sessions in Expo Pass and understandably don't want to start over again from scratch with a new event. Follow these steps to make this simple update.
1 ) From the Details section of Expo Pass, click the [Edit] icon (the pencil).
2) Change the END DATE to your new event end date.
DO NOT CHANGE THE BEGIN DATE YET!
3) Go to your Sessions tab in Expo Pass and [Edit] each session with your new details as needed:
4) AFTER you have updated all of your event sessions, then you can go back and [Edit] the BEGIN DATE of your event.
Once done with all four steps, all other relevant information in Expo Pass will remain as-is as well as the mobile app.