Heh thanks for explaining it, I never knew if noon was 12am or 12pm. In German we say “11 in the morning”, “12 o Clock (noon*)” , and “1 o Clock (in the afternoon)”

But typically we don’t say whether it’s am or pm, it’s clear from context if “i need to be in the work meeting at 9”

Clocks, TV listings, my work timesheet read 24h times. We read 15:00 as “three” most of the time.