Due date

How do I change my due date on Glow?

I had put one when I first found out I was pregnant at 8 weeks. Im 30 weeks now and my due date is more accurate after ultrasounds and what not compared to my calculations before any doctor visits lol. 😂🤦🏼‍♀️

But anywho, how can I change my due date on here to my now, more accurate date???