I love lists of things that happened on certain days. No one day is so boring that at least five significant historical events haven't occurred since man started numbering the light bits between bedtimes.

Wikipedia's list of anniversaries, births, deaths and local holidays for September 15 goes on for several revolutions of the scroll wheel. There have been some pretty major events, all told – but one is missing…

668 - Eastern Roman Emperor Constans II is assassinated in his bath at Syracuse, Italy.

1812 - The French army under Napoleon reaches the Kremlin in Moscow.

1835 - The HMS Beagle, with Charles Darwin aboard, reaches the Galápagos Islands.

1916 - World War I: Tanks are used for the first time in battle, at the Battle of the Somme.

1928 - Sir Alexander Fleming notices a bacteria-killing mold growing in his laboratory, discovering what later became known as penicillin.

1935 - Nazi Germany adopts a new national flag with the swastika.

1940 - World War II: The climax of the Battle of Britain, when the Royal Air Force shoot down large numbers of Luftwaffe. (That must have dampened celebrations at the swastika birthday party.)

1964 - The Sun newspaper launches.

1968 - The Soviet Zond 5 spaceship is launched, becoming the first spacecraft to fly around the Moon and re-enter the Earth's atmosphere. (All credit to the Russians: could there be a better name for a spaceship than Zond 5?)

Famous birthdays on September 15: Marco Polo, Agatha Christie, Eidur Godjohnsen, Prince Harry.

Deaths: Isambard Kingdom Brunel, William Huskisson (first rail fatality).

But missing from this illustrious list is one rather important event in modern-day history.

On September 15, 1997 24 year-old Stanford University students Larry Page and Sergey Brin registered the domain name of "google.com."

Happy birthday, guys! What do you buy for two people with a combined wealth of US$32 billion?

Suggestions below, please.