I think the hour is ok, but I'd like to see the cooldown changed to 20 hours (like in any other modern MMO with a brain) so that you aren't constantly losing minutes due to the hard 24 hour sliding scale for people with consistent play times. I'm more apt to NOT play a day when my statue doesn't refresh after 11:00pm. And it's easier to NOT play the next day after that, and so on and so on.
So... yes, I'm saying that the anniversary statue being on a 24 hour cooldown is costing subscriptions. I think that is a perfectly rational and legitimate claim...
But seriously. Change it to 20 hours already. This should literally be 1 line of code. It's impossible to **** up. Or is it...