"Americans" didn't invent that idea. The Hebrews did -- a long, long, long time ago. Sunday is the first day of the week in almost all of the Americas, Japan,

"Americans" didn't invent that idea. The Hebrews did -- a long, long, long time ago. Sunday is the first day of the week in almost all of the Americas, Japan, South Korea, and China. Monday is the first day in Europe and some (relatively) recent European colonies (e.g., India). The numbering of the days of the week is purely arbitrary. It makes no sense to claim that a particular ordering is "wrong". If one goes by the sheer number of people who use a particular numbering, Americas + China comfortably exceeds Europe + recent European colonies.