July Update isn't a birthday event, we've got some other exciting things planned that we're not ready to share with you just yet! The mount system isn't going to go into production until after the Destiny Engine release on iOS, so you'll have to wait a bit longer to ride your horse across the Highlands.
What do you mean by mount system? Will we be able to buy them?
I understand you dont want to tell us about whats in the July patch but could you give us an estimated date?

We're planning a big system around mounts, they're going to be more than just a pretty way of getting around the game! As we've not started development and haven't locked down all of the design we can't discuss too much but we're planning having different ways of obtaining mounts, vendor purchase, premium mounts, even very rare drops from bosses. Be aware all of this is subject to change.
Regarding the July release, it will be towards the end of the month for both iOS and Android. We'll do a Beta test on Android before it launches.