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. Learn more about your ad-choices at <a href="https://www.iheartpodcastnetwork.com">https://www.iheartpodcastnetwork.com</a>See <a href="https://omnystudio.com/listener">omnystudio.com/listener</a> for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at <a href="https://www.iheartpodcastnetwork.com" rel="noopener noreferrer">https://www.iheartpodcastnetwork.com</a>See <a href="https://omnystudio.com/listener" rel="noopener noreferrer">omnystudio.com/listener</a> for privacy information.

Mata Hari Executed / Gregorian Calendar introduced - October 15

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.

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Mata Hari Executed / Gregorian Calendar introduced - October 15

Mata Hari Executed / Gregorian Calendar introduced - October 15