Last Updated: September 23, 2026
Today in History – September 23 is a monumental date in world and Indian history. From the mathematical prediction and discovery of the solar system’s eighth planet to the launch of the world’s largest healthcare scheme in India, this calendar date holds immense historical weight.
This article covers:
- Major historical events on September 23
- Famous personalities born on September 23
- National and international observances
- Important current affairs and competitive exam facts
Table of Contents
🌟 Top Highlights of September 23
- Astronomical Milestone (1846): Discovery of Neptune, the eighth planet in the solar system, purely based on mathematical calculations.
- Kingdom Unification (1932): Unification of Nejd and Hejaz to form the Kingdom of Saudi Arabia.
- Historic Ceasefire (1965): Ceasefire comes into effect ending the Second Indo-Pakistani War.
- Healthcare Revolution (2018): Prime Minister Narendra Modi launches Ayushman Bharat (PM-JAY), the world’s largest health assurance scheme.
🗓️ Important Historical Events on September 23
1803 – Battle of Assaye
During the Second Anglo-Maratha War, British forces led by Major-General Arthur Wellesley defeated the combined Maratha armies at Assaye in Maharashtra. This victory established British military hegemony over central India.
1846 – Discovery of Neptune
German astronomer Johann Gottfried Galle identified planet Neptune using the calculations provided by French mathematician Urbain Le Verrier. Neptune became the first planet whose existence was mathematically predicted before being visually observed.
1932 – Kingdom of Saudi Arabia Established
King Abdulaziz Ibn Saud issued a decree unifying the Kingdom of Hejaz and Nejd under the name of the Kingdom of Saudi Arabia. September 23 is celebrated annually as Saudi National Day.
1965 – Indo-Pak War Ceasefire
The 1965 war between India and Pakistan came to a formal end after the United Nations Security Council passed a resolution calling for a mandatory, unconditional ceasefire accepted by both nations.
2009 – ISRO Launches Oceansat-2
The Indian Space Research Organisation (ISRO) successfully launched Oceansat-2 along with six European nano-satellites aboard PSLV-C14 from Sriharikota. The mission enhanced oceanographic and weather-monitoring capabilities.
2018 – Launch of Ayushman Bharat (PM-JAY)
Prime Minister Narendra Modi launched the Ayushman Bharat Pradhan Mantri Jan Arogya Yojana from Ranchi, Jharkhand. It provides financial protection of up to ₹5 lakh per family per year for secondary and tertiary care hospitalization.
Other Major Events
- 1889: Nintendo Koppai (now Nintendo Co., Ltd.) was founded by Fusajiro Yamauchi in Kyoto, Japan.
- 1952: US Vice-Presidential candidate Richard Nixon delivered his iconic “Checkers speech”.
🎂 Famous Birthdays on September 23
| Year | Personality | Domain / Notable Achievement |
| 63 BCE | Augustus Caesar | First Emperor of the Roman Empire. |
| 1908 | Ramdhari Singh Dinkar | Renowned Hindi poet, essayist, and Jnanpith laureate honored as ‘Rashtrakavi’ (National Poet). |
| 1917 | Dr. Asima Chatterjee | Pioneering Indian organic chemist known for development of anti-malarial and anti-epileptic drugs. |
| 1926 | John Coltrane | Iconic American jazz saxophonist and composer. |
| 1930 | Ray Charles | Legendary American singer, songwriter, pianist, and pioneer of soul music. |
| 1949 | Bruce Springsteen | Grammy Award-winning American rock singer and songwriter. |
| 1985 | Ambati Rayudu | Former Indian international cricketer and IPL champion. |
🕯️ Notable Death Anniversaries on September 23
- 1863 – Rao Tula Ram: Key leader of the Indian Rebellion of 1857 in Haryana.
- 1939 – Sigmund Freud: Austrian neurologist and founding father of psychoanalysis.
- 1973 – Pablo Neruda: Chilean poet and Nobel Prize in Literature laureate.
- 1974 – Jayachamarajendra Wadiyar: The 25th and last ruling Maharaja of the Princely State of Mysore.
- 1996 – Silk Smitha: Popular Indian film actress.
📢 National & International Days Observed on September 23
- International Day of Sign Languages: Observed annually on September 23 under the United Nations. Established by the UN General Assembly in 2017, the day promotes awareness of sign languages, Deaf culture, accessibility, and equal rights for Deaf people worldwide.
- Saudi National Day: Commemorates the unification of the dual kingdom of Hejaz and Nejd and establishment of the Kingdom of Saudi Arabia by King Abdulaziz in 1932.
💡Did You Know?
- Calculated Discovery: Neptune was discovered using pencil and paper before it was ever seen through a telescope. Urbain Le Verrier calculated its exact position by studying irregularities in Uranus’s orbit.
- Playing Cards Origin: Global gaming behemoth Nintendo originated on September 23, 1889, as a small shop making handcrafted Hanafuda playing cards in Kyoto, Japan.
- Scale of PM-JAY: Ayushman Bharat covers over 500 million beneficiaries, making it larger than the entire population of the United States, Canada, and Mexico combined.
❓Frequently Asked Questions (FAQs)
Q1: When was Neptune discovered?
Ans: Neptune was discovered on September 23, 1846, by astronomer Johann Gottfried Galle based on predictions by Urbain Le Verrier.
Q2: When was Ayushman Bharat (PM-JAY) launched in India?
Ans: PM-JAY was launched on September 23, 2018, by Prime Minister Narendra Modi in Ranchi, Jharkhand.
Q3: What is the significance of the International Day of Sign Languages observed on September 23?
Ans: It aims to promote, preserve, and protect sign languages and the human rights of deaf individuals worldwide under the UN mandate.
Q4: Who fought the Battle of Assaye in 1803?
Ans: It was fought on September 23, 1803, between the British East India Company forces led by Major-General Arthur Wellesley and the Maratha Confederacy.
Q5: Who is known as ‘Rashtrakavi’ in Hindi literature, born on September 23?
Ans: Ramdhari Singh ‘Dinkar’, born on September 23, 1908.
Q6: Who was Dr. Asima Chatterjee?
Ans: Dr. Asima Chatterjee (born September 23, 1917) was an eminent Indian organic chemist and the first woman to receive the Shanti Swarup Bhatnagar Prize in Chemical Sciences.
Q7: Who founded psychoanalysis and passed away on September 23, 1939?
Ans: Austrian neurologist Sigmund Freud passed away on September 23, 1939.
Q8: Why is September 23 celebrated as Saudi Arabia’s National Day?
Ans: It marks the decree issued on September 23, 1932, by King Abdulaziz unifying Nejd and Hejaz into the Kingdom of Saudi Arabia.