The Holiday America Invented and Then AbandonedEvery year on May 1st, workers in more than 160 countries take to the streets to mark International Workers' Day. It is one of the most widely observed public holidays on the planet. Almost nobody knows it was born in the United States — or why Americans no longer celebrate it on that date.A ready-to-use EFL/ESL lesson for B1–B2 learners (ages 14–adult) exploring the surprising American origins of International Workers' Day — and why the United Stat