Today in History is a daily newsletter from Britannica. (more) Today in History—April 6: ABBA Makes History—and References It Written by Meg Matthias Meg Matthias is Senior Video Production Manager at Encyclopædia Britannica. Meg Matthias Fact-checked by Britannica Editors Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Britannica Editors Last updated Apr. 2, 2026 •History Mamma Mia! On this day in 1974, most of the world met the band that would soundtrack Hollywood films, Broadway musicals, and the playlists of—we can only assume—every single one of your cousins’ weddings. Today in History is a daily newsletter from Britannica. Encyclopædia Britannica, Inc. Want to learn more about what happened on April 6, or any other day of the year? Sign up to receive the newsletter in your inbox every morning. But...

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