How can I change the time of the first and last meal in my Fasting plan?

Go to the Me tab, press the gear icon in the top-right corner of the screen, and then choose Meal plan:    

2. Tap Fasting plan: 

3. Choose your Fasting plan and click Continue. 

4. Edit the eating time for your first and last meal and click Confirm. 

Your Fasting time will now be updated in the app.

In your Meal Plan tab, you can choose the settings in the top right corner and also select Fasting plan: