Its probably not a patch, it will likely just be an anouncement about the upcomming season/not-season(really big update in May). Also, I'm pretty sure that there's less than 3 days on the counter, not 4.
So there you go, cake, and you can eat it too. In may.
THE CAKE IS A LIE!!!!
On a slightly less than serious note: This timer is probably counting down to some most likely miniscule amount of information on the May update, at which point there will be another timer counting down to either:
1)Some more miniscule amount of information on the May update.
2)The May update itself.
And if there isn't, there probably will be eventually.