Renaming your clock is super easy. Here's how to do it:
From the home screen, tap on, "Clocks".
Tap on the clock that you'd like to rename.
Tap on the, "Settings" icon (it looks like a gear) from the bottom menu (it's the last icon on the right).
Under the, "Details" section, you'll see, "Clock Name". Tap on the right side of that row,.
Your current clock's name will appear. Tap on that to bring up the keyboard.
Change your clock's name to a new one and tap the, "Update" button in the top right corner.
I hope that helps!