देश और दुनिया के इतिहास के पन्नों में 31 जुलाई कई कारणों से महत्वपूर्ण है, उनमें से ये सभी प्रमुख हैं:-
- 1880 में आज ही के दिन प्रसिद्ध हिन्दी कहानीकार और उपन्यासकार प्रेमचंद का जन्म हुआ था।
- 1947 में प्रसिद्ध बॉलीवुड अभिनेत्री मुमताज़ का जन्म हुआ।
- 1940 में स्वतंत्रता सेनानी अमर शहीद ऊधम सिंह का निधन भी आज ही के दिन हुआ था।
- 1971 में अपोलो-15 अंतरिक्ष यात्रियों ने इलेक्ट्रिक का साढ़े 6 घंटे की यात्रा की थी।
- 2006 में फिदेल कास्त्रो ने अपने भाई को सत्ता सौंपी थी।
- 2010 में बाढ़ से पाकिस्तान में 900 लोगों की मौत हो गई थी।
1999
NASA crashed their Lunar Prospector space probe into a crater near the Moons south pole in an attempt to find frozen water. (They did not)

1998
The British Government announced a total ban on its use of land mines .

1969
Halfpenny ceases to be legal tender in Britain

1969
Elvis Presley returned to live performing after an eight-year break while he concentrated on his recording career and movies

1965
Last cigarette commercial on British television

1956
Jim Laker took all 10 wickets in the Test Match with figures of 10/53 in the Australian second innings, a feat not recorded before and only once since.

1948
New York International Airport (also known as Idlewild Airport) was dedicated. It was renamed John F. Kennedy International Airport in 1963.

1943

1919
Birth or Primo Levi, writer

1917
Death of Hedd Wyn, a war poet who wrote in the Welsh language and who was killed during the Battle of Passchendaele in World War I.

1917
Third Battle of Ypres
1886
Death of Franz Liszt, composer

1875
Death of Andrew Johnson, 17th US President

1867
Death of Benoit Fourneyron, inventor of the water turbine

1865

1858
Birth of Richard Dixon Oldham, British geologist who discovered evidence of the Earth’s core.

1498
Christopher Columbus arrived in Trinidad

1492
Expulsion of the Jews from Spain with the issuing of the Alhambra Decree by Ferdinand & Isabella, joint Christian rulers of Spain.
