My first time hearing this was today....I never heard the first of May called Mayday. It was the dude at my bank.....My reply to his "Hey, it's Mayday" was "Yup, guess that means it'll be Cinco de Mayo before we know it" and he just looks at me like I said the most retarded shit ever.....It's kind fucking with me because did I disrespect "Mayday"....Did he not know what CDM was?....How did I offend this dude over something that seems so completely asinine.