April 1
day of the year
April 1 is the 91st day of the year (92nd in leap years) in the Gregorian calendar; 274 days remain until the end of the year.
Events
Pre-1600
285 – Roman emperor Diocletian names Maximian his co-emperor ("Augustus").
527 – Byzantine Emperor Justin I names his nephew Justinian I as co-ruler and successor to the throne.
1081 – Alexios I Komnenos overthrows the Byzantine emperor Nikephoros III Botaneiates, and, after his troops spend three days extensively looting Constantinople, is formally crowned on April 4.
1572 – In the Eighty Years' War, the Watergeuzen capture Brielle from the Seventeen Provinces, gaining the first foothold on land for what would become the Dutch Republic.
1601–1900
1725 – J. S. Bach's later Easter Oratorio in its first version is performed at the Nikolaikirche in Leipzig on Easter Sunday.
1789 – In New York City, the United States House of Representatives achieves its first quorum and elects Frederick Muhlenberg of Pennsylvania as its first Speaker.
1833 – The Convention of 1833, a political gathering of settlers in Mexican Texas to help draft a series of petitions to the Mexican government, begins in San Felipe de Austin.
1865 – American Civil War: Union troops led by Philip Sheridan decisively defeat Confederate troops led by George Pickett, cutting the Army of Northern Virginia's last supply line during the Siege of Petersburg.
1867 – Singapore becomes a British crown colony.
The public source identifies “April 1” as day of the year. This brief keeps that definition visible, then builds a research path around April and year.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 23, 2026. The linked authority identifier is Q2510. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1600, 1081, 1572 and 1601.
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This entry incorporates text from “April 1” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.