Is it weird that I am not even surprised that your manager was clueless? XD
I feel for you though, this must have been SO annoying.

Somehow, I use my weather app to help me remember timezones. I put my hometown in it so I know when to talk to my family.

Hey if it works

Yeah I have to check my clock app or weather app to see what time or weather it is sometimes just to remind myself lol. My parents phones, they can see both on their Home Screen lol.

I don't have weather showing on the lock screen, that's the clock and notifications only

The only other timezones I managed to memorize were California, and India is either 11 off or 13 off from here. XD

Using weather apps to manage timezones is pretty clever!

I don’t have weather on my Lock Screen either. Probably bc mines isn’t a phone and it’s just an itouch lol.

Wall clocks are wonderful things.
I don't even try to keep track of the time.
I just check the clocks when curious.

Of course, I am not especially known for punctuality; I have been known to lose track of time when focusing on something, and only realize it's "time for lunch break" when I'm told they have to lock up for the night and can I hurry up?

So it's not foolproof.

I am a fool, and have proven it. :P

There’s a 24hr clock display on the microwave here. And a no number just dots and dashes clock as well. Every 5 secs, there’s a blink of light. Lol

Mainly tho, I just use my devices to tell me what the time is. And the weather. Lol

At work I have the computer XD
At home, I usually judge what time it is by the outside light.
Same when I'm outside. But I'm also usually playing Pikmin Bloom when I'm walking around which means I do check my phone a lot.

Before a hotel blocked my view I could tell whether it would rain or not by looking at the tall building a few kilometers away but now I have to check the app.

I used to wear a watch. But then I had to get the batteries replaced and I still haven’t gotten around to doing that. Lol. So no watch for me. That and it’s too hot to wear a watch lol.