Once upon a time CaptainSparklez showed us a concept, that using villagers, pressure plates, doors, and some redstone, would create a machine that would export a output signal if it was night. Well now villagers have one less use, because Jeb from Mojang has created the Daylight Detector. This machine is rather simple - if it's day, it will output redstone signals. As with any Redstone machine you could use an inverter to make it output a signal at night, replacing the old villager method. This is one of my favorite recent additions, is it one of yours?
Source: Twitter