spondias dulcis time from fruit set to ripe?

[Daintree]

Finally, I have been able get a tree from my daughter-in-law's childhood memory to set fruit!!!! When I texted her photos, she called me up right away, and the screaming and crying was so loud I thought their house was on fire! Can someone please tell me how long it takes June Plum (cas mango in Cameroon) to ripen? Incredibly, I planted these from seed in March! Precocious little buggers!!!

Thanks!
Carolyn