Mata Hari was executed for espionage on this day in 1917. / On this day in 1582, Pope Gregory XIII introduced the Gregorian calendar, which was created as a way to reform the Julian calendar.

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<p>Mata Hari was executed for espionage on this day in 1917. / On this day in 1582, Pope Gregory XIII introduced the Gregorian calendar, which was created as a way to reform the Julian calendar.</p><p> </p> Learn more about your ad-choices at <a href="https://www.iheartpodcastnetwork.com">https://www.iheartpodcastnetwork.com</a>

From the desk of “Stuff You Missed in History Class,” “This Day in History Class” quickly recounts a tidbit from today’s events in history.

This Day in History Class

Mata Hari Executed / Gregorian Calendar introduced - October 15

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/e0ca2235-408a-4ea5-89f3-ae3200327678/transcript