To adjust your shop days follow the below steps.
1. Click the pink icon located in the upper right-hand corner of the screen
2. Click Advanced Meal Plan Settings
3. Scroll to the bottom of the screen
4. Click "Which day will you shop"
5. Select the day of the week
6. Hit Save.
* Keep in mind the grocery list will change. A pop-up will prompt before making the changes. See below screenshot