Tuesday, September 16, 2025 is a Tuesday. It is day 259 of 2025 (71% through the year), ISO week 38, in Q3.
Calendar Specifications
Tuesday, September 16, 2025 combines practical calendar facts with a wider view of the day: 2013: A lone gunman fatally shot twelve people and injured three others at the headquarters of the Naval Sea Systems Command in Washington, D.C.. Use it to check the date, plan across time zones, and scan the observances and historical markers attached to September 16.
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Historical Milestones
A lone gunman fatally shot twelve people and injured three others at the headquarters of the Naval Sea Systems Command in Washington, D.C.
Washington Navy Yard shooting →Seventeen Iraqi civilians were shot and killed by Academi guards in Baghdad.
Nisour Square massacre →The British pound (coin pictured) was forced out of the European Exchange Rate Mechanism on Black Wednesday and suffered a major devaluation.
Pound sterling →Construction of the Northern Xinjiang railway (terminus pictured) was completed between Ürümqi South and Alashankou, linking the railway lines of China and Kazakhstan and adding a sizeable portion to the Eurasian Land Bridge.
Northern Xinjiang railway →During a tour of the United States, Soviet politician Boris Yeltsin visited a grocery store in Texas that had a major impact on his views regarding the Soviet Union's economic system.
Boris Yeltsin →A Lebanese militia under the direct command of Elie Hobeika carried out a massacre in the Palestinian refugee camp of Sabra and Shatila, killing at least 460 civilians.
Elie Hobeika →Eight people escaped from East Germany to West Germany in a home-made hot air balloon.
East Germany balloon escape →The prototype of the Soviet Mikoyan MiG-31, one of the fastest combat jets in the world, made its maiden flight.
Mikoyan MiG-31 →Malaysia was formed as an independent nation from the Federation of Malaya, the Colony of Singapore, the Crown Colony of North Borneo, and the Crown Colony of Sarawak.
Malaysia →Typhoon Nancy, which possibly had the strongest winds ever measured in a tropical cyclone, made landfall in Muroto, Japan.
Typhoon Nancy (1961) →Calculate business days and elapsed calendar time between this date and any other.
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Questions & Answers
Tuesday, September 16, 2025 falls on a Tuesday.
372 days ago (1 year, 7 days ago). It is day 259 of 2025 with 106 days remaining in the year.
In Roman numerals, Tuesday, September 16, 2025 is written as XVI.IX.MMXXV (Day.Month.Year format).
The moon phase for this date is Last Quarter (approx. 35% illuminated). The astrological sun sign is Virgo.