Clock [Q]Clock app from 4.1.2 to 4.3

Today I got Xperia M as an upgrade from Xperia Active and I already updated it to 4.3 but I don't like new Clock application. I prefer old one from 4.1.2 because of desk clock feature that shows clock and then lock-screen instead of bright lock-screen in the middle of the night then dark clock. So is there any way to get old app to work with 4.3 or you can suggest alternative for that clock application.