Zamen | زامن
Temporal adds your world clocks to the Lock screen (and supports a good cause)
If you ever wanted to know what time it was in a different part of the world, you would typically resort to asking Siri or launching the Clock app from your Home screen to see your saved time zones.
On the other hand, a new jailbreak tweak called Temporal by ridn puts that information right on your Lock screen so it's the first thing you see when you wake your device up from a sleep.
After you install the tweak, your Lock screen will look like nothing has changed, but you will be able to swipe left and right on the clock to switch between the various world clocks, as shown in the animated GIF below: