Your nation's airport codes

I just saw something online about a someone appearing at a Calgary Comedy Club with "YYC" in their social media handle. How strange. I Google, and come to find it's the airport code. I WAS HUMILIATED! Thank God it was Canada, because I certainly know my own nation's codes (USA). But I skipped that voluntary summer session where I could have learned Airport Codes of the Americas. I'll never forgive myself. After your teens, your brain stops imprinting airport codes. THAT'S WHY IT'S PART OF THE HIGH SCHOOL CURRICULUM! 🥇🥈🥉