Final answer:
The day is known as Bloody Sunday, where 20 explosions occurred, resulting in 13 deaths and 120 injuries in Northern Ireland during a civil rights march.
Step-by-step explanation:
The day that 20 explosions occurred and 13 people were killed, along with 120 injuries in Northern Ireland is known as the Bloody Sunday. It took place on January 30, 1972, in the city of Derry. The incident happened during a civil rights march when British soldiers opened fire on unarmed civilians, resulting in the tragic loss of life and injuries.
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