On February 27
On February 27, the Human Saga records one pivotal event: Edict of Thessalonica makes Nicene Christianity the state religion (380 CE).
On this day
On 27 February 380 CE the emperors Theodosius I, Gratian and Valentinian II issued the Edict of Thessalonica (Cunctos populos), commanding all peoples of the empire to follow the Nicene faith professed by the bishops of Rome and Alexandria.
Also this week in history (Feb 24 – Mar 1)
On 24 February 2022 Russia launched a full-scale invasion of Ukraine, the largest armed conflict in Europe since the Second World War, escalating a war that had begun with Russia's 2014 annexation of Crimea and intervention in the Donbas.
On 1 March 1872 President Ulysses S. Grant signed the act establishing Yellowstone National Park in the territories of Wyoming and Montana, creating the first federally protected national park in the world.
On 1 March 1896, near the town of Adwa in northern Ethiopia, an Ethiopian army under Emperor Menelik II decisively defeated an invading Italian colonial force led by General Oreste Baratieri.
On 1 March 1954 the United States detonated Castle Bravo, a lithium-deuteride-fuelled thermonuclear device, at Bikini Atoll in the Marshall Islands as the opening shot of Operation Castle.