Or tell time.
Once a teenaged girl around 16 YO saw that I was wearing a watch (obviously a few years ago before everyone had a phone) and asked me for the time.
The light wasn’t bright enough for me to read it so I just held my wrist up for her. She looked mortified, and then looked back at her mother who was then equally embarrassed. The girl couldn’t read it as it was not digital.
Oh dear. I managed to make out the time for her. I wondered if the incident motivated her to learn how to read a normal clock but then I thought nah, if noone had noticed or cared by that point already...
I guess they don’t teach clocks in school anymore? About the big hand and the little hand and the second hand.