1 Every year, more people see UFOs on July 23rd than any other date.

2 The average smartphone user checks their device 23 times a day for texting

3 When he was assassinated, Julius Caeser was stabbed a 23 times.

4 The Hiroshima bomb was dropped at 8:15 (8+15=23).

5 William Shakespeare was born in Stratford Upon Avon on 23 April 1564. He died 52 years later on his birthday, 23 April 1616.

6 Kurt Cobain, the god of grunge, was born in 1967 and died in 1994 - 1+9+6+7= 23, 1+9+9+4 = 23.

7 Charles Darwin's Origin of Species was published in 1859 - 1+8+5+9 = 23.

8 Michael Jordan, the American basketball player, wore the number 23 throughout his career. 

9 In deference to Jordan, David Beckham swapped his Manchester United jersey number 7 for number 23 when he joined Real Madrid.

10 Each parent contributes 23 chromosomes to the start of human life.

11 The first morse code transmission - "What hath God wrought?" - was from the Bible passage Numbers 23:23.

12 The Birthday Paradox states that a group of 23 randomly-selected people is the smallest number where there will be a probability Higher than 50 per cent that two people will share the same birthday.

13 According to Josephus, Adam and Eve had 23 daughters.

14 Blood takes an average of 23 seconds to circulate in the human body.

15 April 19 – April 19th, as in 4-19 (4 + 19 = 23), is the date of the Battle of Lexington, Waco, and the Oklahoma City Bombing

16 Ancient Sumerians and Egyptians celebrated the start of the New Year on July 23.

17 Euclid formulated 23 axioms for geometry.

18 The Romans had 23 letters in their alphabet.

19 In the disaster movie, Airport, the bomber has seat 23.

20 Luke Skywalker, Han Solo and Chewbacca sneak into detention block AA23 to rescue Princess Leia.

21 The average human physical biorhythm is 23 days.

22 For numerologists: the 23rd prime number is 83. Since 23 is also a prime number, this makes 83 a super-prime number: a prime that occupies a prime position in the list of all prime numbers. Also, 83 is the sum of three consecutive primes: 83 = 23 + 29 + 31; and the sum of five consecutive primes: 83 = 11 + 13 + 17 + 19 + 23.

23 The Nobel Prize-winning mathematician John Forbes Nash, Jr., whose struggle to overcome mental illness is documented in the movie A Beautiful Mind, once told a student at Massachusetts Institute of Technology that 23 was his favorite prime number, and insisted that he had appeared on the cover of Life magazine, disguised as Pope John XXIII. Nash, oddly, died in a car accident on May 23, 2015.