100% verified The same day, three eras.

9 December

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Contemporary era

1968

The Mother of All Demos

On 9 December 1968, Douglas Engelbart demonstrated the mouse and the graphical interface in a historic presentation.

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Contemporary era

1854

Publication of The Charge of the Light Brigade

On 9 December 1854, Tennyson published his poem The Charge of the Light Brigade.

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From the Middle Ages to the Enlightenment

1531

Apparitions of Our Lady of Guadalupe

On 9 December 1531, the apparitions of the Virgin of Guadalupe began in Mexico.

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