Today
Thursday September 17 2026
- Day of the year
- 260/ 365
- Week
- 382,026
- Days left
- 10571%
- Moon
- 39%Waxing crescent
Today is Thursday, September 17, 2026. It is day 260 of 2026, a year of 365 days: 105 remain, and 71% of the year has gone. Under ISO 8601 this date falls in week 38.
What's celebrated on this date
No United Nations international day falls on this date.
Coming up
- September 21International Day of Peace
- September 26International Day for the Total Elimination of Nuclear Weapons
- September 27World Tourism Day
Saints and name days
Saints whose feast falls on this date, most widely known first.
- MelillaSpanish autonomous city in northwestern Africa
- Hildegard of BingenGerman Benedictine abbess, polymath, mystic and Doctor of Church (1098–1179)
- Robert BellarmineCatholic cardinal, saint, and Doctor of the Church
- Lambert of Maastrichtbishop of Maastricht (635-705)
- Zygmunt Szczęsny FelińskiPolish archbishop
Sources : Wikidata (P841) · CC0 1.0
Astronomy
New York
- Sunrise
- 06:39
- Sunset
- 19:02
- Length of day
- 12h 23m−3 min vs yesterday
- Solar noon
- 12:50
Times shown for America/New_York
Season
Summer
began on June 21, 2026
Next season
Autumn — 5 days, September 22, 2026 (September equinox)
Public holidays — United States
Not a public holiday in the United States.
Next public holiday : Columbus Day — October 12, 2026
National holidays only. Regions, provinces and Länder add their own.
Moon
Waxing crescent
Illumination : 39%
Moon age : 6.5 days
- Next full moon
- September 26, 2026
- Next new moon
- October 10, 2026
Astrology
Today's zodiac sign
Virgo
until September 23, 2026 — Libra
Zodiac dates are an astrological convention, not the Sun's actual position among the constellations. The astronomy above is measured; this is not.
On this day in history
1176
The Battle of Myriokephalon is the last attempt by the Byzantine Empire to recover central Anatolia from the Seljuk Turks. Wikipedia
1631
Sweden wins a major victory at the Battle of Breitenfeld against the Holy Roman Empire during the Thirty Years' War. Wikipedia
1787
The United States Constitution is signed at Independence Hall in Philadelphia, bringing the Constitutional Convention to an end. Wikipedia
1809
Peace between Sweden and Russia in the Finnish War; the territory that will become Finland is ceded to Russia by the Treaty of Fredrikshamn. Wikipedia
1862
American Civil War: George B. McClellan's Army of the Potomac halts the first invasion of the North by Robert E. Lee and his Army of Northern Virginia in the single-day Battle of Antietam, the bloodiest day in American military history. Wikipedia
1944
World War II: Allied airborne troops parachute into the Netherlands as the "Market" half of Operation Market Garden and British XXX Corps advances into the Netherlands as the "Garden" half of the Operation. Wikipedia
Show more (4)
1948
The Lehi (also known as the Stern gang) assassinates Count Folke Bernadotte, who was appointed by the United Nations to mediate between the Arab nations and Israel. Wikipedia
1978
The Camp David Accords are signed by Israel and Egypt. Wikipedia
1980
Former Nicaraguan President Anastasio Somoza Debayle is killed in Asunción, Paraguay. Wikipedia
1991
Estonia, North Korea, South Korea, Latvia, Lithuania, the Marshall Islands and Micronesia join the United Nations. Wikipedia
Sources : Wikipedia (en) · CC BY-SA 4.0 · Data imported on 2026-08-26
Births and deaths
Born on this day September 17
- 879Charles the Simple, Frankish king (died 929)
- 1550Paul V, pope of the Catholic Church (died 1621)
- 1826Bernhard Riemann, German-Italian mathematician and academic (died 1866)
- 1918Chaim Herzog, Irish-born Israeli general and politician, 6th President of Israel (died 1997)
- 1922Agostinho Neto, Angolan poet and politician, 1st President of Angola (died 1979)
- 1923Hank Williams, American singer-songwriter and guitarist (died 1953)
- 1928Roddy McDowall, English-American actor (died 1998)
- 1929Stirling Moss, English racing driver and sportscaster (died 2020)
Died on this day September 17
- 1665Philip IV, king of Spain (born 1605)aged 60 years
- 1836Antoine Laurent de Jussieu, French botanist and author (born 1748)aged 88 years
- 1863Alfred de Vigny, French author, poet, and playwright (born 1797)aged 66 years
- 1877Henry Fox Talbot, English photographer, developed the Calotype Process (born 1800)aged 77 years
- 1980Anastasio Somoza Debayle, Nicaraguan commander and politician, 73rd President of Nicaragua (born 1925)aged 55 years
- 1994Karl Popper, Austrian-English philosopher and academic (born 1902)aged 92 years
- 1996Spiro Agnew, American soldier and politician, 39th Vice President of the United States (born 1918)aged 78 years
- 1997Red Skelton, American actor and comedian (born 1913)aged 84 years
Sources : Wikipedia (en) · CC BY-SA 4.0 · Data imported on 2026-08-26
The day in words
In New York the sun rises at 06:39 and sets at 19:02, giving 12h 23m of daylight — 3 minutes less than yesterday. It has been summer since June 21, 2026; autumn opens in 5 days, on September 22, 2026 (September equinox).
The moon is a waxing crescent, 39% illuminated. The next full moon falls on September 26, 2026 and the next new moon on October 10, 2026.
The saints' calendar attaches September 17 to Melilla, Hildegard of Bingen and Robert Bellarmine.
No United Nations international day falls on September 17. The next one on the calendar is International Day of Peace, on September 21.
It is not a public holiday in the United States.
On this day in history: The Battle of Myriokephalon is the last attempt by the Byzantine Empire to recover central Anatolia from the Seljuk Turks (1176); Sweden wins a major victory at the Battle of Breitenfeld against the Holy Roman Empire during the Thirty Years' War (1631). English Wikipedia records 10 events for this date.
Charles the Simple was born on September 17, 879; Philip IV died on September 17, 1665.
99 days remain until Christmas and 106 until New Year's Day.
In astrology — kept separate from the measured astronomy above, deliberately — September 17 falls under the sign of Virgo.
Calendar
By the numbers
- 71%
- of the year elapsed
- 99
- until Christmas
- 106
- until New Year
- 530
- until the next 29 February
2026 — Common year (365 days)
Work with dates
Sources
Every block on this page names where its data comes from. Nothing here is generated when the source is silent.
- United Nations — International Days— What's celebrated today
- Wikidata (P841)— Saints and name days · CC0 1.0
- Wikipedia (en)— On this day in history · CC BY-SA 4.0 · Data imported on 2026-08-26