Four Murano glass Carnival figurines on a showroom shelf — Harlequin in black and amber, a dancer in deep red, a jester in millefiori, a fourth in swirling multicolor. The craft in each piece is genuine. The price tag on the rightmost reads €188.30. On November 8, 1291, the Venetian Great Council issued a decree ordering every glassmaker in the city to relocate to the island of Murano. The stated reason was fire risk — Venice was largely built of wood and furnaces burned at over 1,500°C.

August 6 has a gift for endings that contain beginnings, and beginnings that contain, somewhere inside them, a kind of ending. The date does not repeat itself — no two of its significant moments share a century — but they share a structure: something that had always seemed permanent is suddenly, irreversibly gone, and something else steps into the space it occupied. On August 6, 1806, Emperor Francis II dissolved the Holy Roman Empire of the German Nation.

Michelangelo Merisi da Caravaggio arrived in Rome around 1592, at approximately 21, with no money, no connections, and a technique nobody in the city had seen before. He was dead by 1610, at 38 or 39, on a beach in Porto Ercole, probably of fever, possibly of lead poisoning from his own pigments, possibly of something worse. In between, he produced roughly 80 paintings that broke Western art into a before and an after — and killed a man in a street brawl, fled Rome as a fugitive, killed or badly wounded at least one other person in Malta, and spent the last four years of his life on the run from a papal death warrant.

Some dates produce men and moments that do not make sense until later. January 17 has a particular talent for this — for the warning given too soon to be heard, for the survival that arrives at too high a cost, for the birth of a mind that its own era could not fully contain. On January 17, 1706, Benjamin Franklin was born in Boston, the fifteenth of seventeen children of a candle and soap maker.

There are dates that reach. July 20 has, on at least three occasions across the twentieth century, been the date on which human beings attempted something they were not certain they could survive — and found out, in very different ways, what certainty was worth. On July 20, 1944, Colonel Claus von Stauffenberg placed a briefcase containing a kilogram of plastic explosive under a table in the Wolf’s Lair, Adolf Hitler’s field headquarters in East Prussia.

History does not usually return to the same address. It prefers to move on, to rearrange the furniture in a new room, to pretend it is doing something for the first time. But occasionally a date refuses to let it do that. June 28 is one of those dates — a calendar address that history has knocked on three times, each time with a different face and the same obscure necessity.

“Beware the Ides of March” is advice Rome gave the world, and the world has spent two thousand years testing whether it applies only to the original recipient. The evidence is mixed. March 15 has not always been violent. But it has, with some regularity, been the day someone discovers that the position they thought they held has already been vacated. On March 15, 44 BC, Gaius Julius Caesar arrived at the Theatre of Pompey for a meeting of the Senate and was stabbed twenty-three times by a group of senators who believed they were saving the republic.

Some dates specialize. May 7 has, across three separate centuries and two world wars, developed a recurring relationship with the moment empires and armies admit they cannot continue. The pattern is not coincidence. It is the calendar doing what it does — accumulating weight until a date no longer belongs only to the year it inhabits. On May 7, 1915, the RMS Lusitania was struck by a German torpedo fourteen miles off the southern coast of Ireland.

The armistice ending the First World War was signed at 5:10 AM on November 11, 1918, in a railway carriage in the Forest of Compiègne, north of Paris. It was agreed to take effect at 11 AM — the eleventh hour of the eleventh day of the eleventh month — a time chosen for its symbolic tidiness. The six hours between signature and cessation were not a logistical necessity. The war could have stopped at 5:10.

The Germans have a word for it: Schicksalstag. Fate day. November 9 is theirs — not by design, not by any organizing intelligence, but through a series of violent coincidences that accumulated over seventy years until the date itself seemed to carry a kind of national gravity, pulling catastrophe and liberation alike into its orbit. It began, by most reckonings, in 1918. On November 9 of that year, Kaiser Wilhelm II abdicated the German throne, ending the Hohenzollern dynasty after 500 years.