Dates only go up to 40 weeks?

I love the Glow nurture app, and the daily articles, but as my due date approaches (40wks on Wednesday! Eep!) I have noticed that the calendar doesn't seem to go past my due date?

This just seems odd to me, since it is reiterated in many of the articles linked to by the app, that normal gestation can be from 38-42 weeks.

I have noticed that many of the women on here are from the US, and that it seems more common to schedule inductions and c-secctions before their due dates. Here in Australia (and it would seem in Canada and the UK also) unless your pregnancy is high risk, we aren't offered assisted delivery options until we're at least a week past our due dates.

What will happen to my calendar/home screen if (probably when) I go past my due date on Wednesday?