I still wear a watch because of reasons like that. (I look at my watch, I have 2:30) "What time do you have?" "3:30" "Ok. Let's meet in an hour. That's 4:30

I still wear a watch because of reasons like that. (I look at my watch, I have 2:30) "What time do you have?" "3:30" "Ok. Let's meet in an hour. That's 4:30 for you." (Which I know will be 3:30 for me) My watch also runs for years on a single battery. I probably get asked for time once a week by somebody whose phone has died. (Wearing a watch is the universal symbol for "I have the time")