Google has celebrated the 29 February by giving the date that only comes around once every four years its own doodle.
The season that 2016 has an extra day is due to planetary orbits.
The Gregorian calendar, the most widely used across the globe, measures a year to be 365 days following the Earth's orbit around the Sun.
However, the earth's orbit takes 365.24 days to complete its solar orbit and an extra day every four years is added to keep calendar seasons synchronised with solar seasons.
February was chosen as the month to have the leap day as it is the only month without 30 or 31 days.
It has long been suggested that February only has 28 days due to the jealousy of Roman Emperors.
According to the theory, the second month of the year had 30 days before the reign of Roman Emperor Augustus.
1/30 Nettie Stevens
Google celebrates Nettie Stevens 155th birthday
2/30 Father's Day 2016
Google celebrates Father's Day 2016
3/30 Elizabeth Garrett Anderson birthday
Google celebrates Elizabeth Garrett Anderson 180th birthday
4/30 Earth Day
Google celebrates Earth Day 2016
5/30 Ravi Shankar
Google marks Pandit Ravi Shankar's 96th birthday
6/30 Olympic Games in 1896
Google are celebrates the 120th anniversary of the modern Olympic Games in 1896
7/30 World Twenty20 final
Google celebrates the 2016 World Twenty20 cricket final between the West Indies and England with a doodle
8/30 William Morris
Google celebrates William Morris' 182 birthday with a doodle showcasing his most famous designs
9/30 St Patrick's Day
17 March 2016: St Patrick's Day
10/30 Caroline Herschel's 266th birthday
Caroline Herschel discovered eight comets and comprehensively catalogued the stars
11/30 Clara Rockmore's 105th birthday
Clara Rockmore was a pioneer of the Theremin musical instrument
12/30 International Women's Day
#OneDayIWill video marks International Woman's Day on 8 March, 2016
13/30 St David's Day 2016
Google marks St David's Day 2016 with a doodle
14/30 Leap Year
Google celebrates Leap Day 2016, February 28
15/30 Lantern Festival 2016
Google celebrates the last day of the Chinese New Year celebrations with a doodle of the Lantern Festival
16/30 Stethoscope Inventor, René Laennec
Google celebrate's René Laennec's 235th birthday
17/30 Valentine's Day 2016
Google celebrates Valentine's Day with a romantic Doodle
18/30 Dmitri Mendeleev
Google celebrate Dmitri Mendeleev's 182nd birthday
19/30 "The televisor" demonstartion
Google Doodle celebrates 90 years since the first demonstration of television or "the televisor" to the public
20/30 Professor Scoville
Google marks Professor Scoville’s 151st birthday
21/30 Sophie Taeuber-Arp
Google marks Sophie Taeuber-Arp's 127th birthday
22/30 Charles Perrault
Google celebrates author Charles Perrault's 388th birthday
23/30 Mountain of Butterflies discovery
Google celebrates the 41st anniversary of the discovery of the Mountain of Butterflies
24/30 Winter Solstice
Google celebrate the Winter Solstice 2015
25/30 St Andrew's Day 2015
Google marks St Andrew's Day 2015 with doodle featuring Scotland's flag and Loch Ness monster
26/30 41st anniversary of the discovery of 'Lucy'
Google marks the 41st anniversary of the discovery of 'Lucy', the name given to a collection of fossilised bones that once made up the skeleton of a hominid from the Australopithecus afarensis species, who lived in Ethiopia 3.2 million years ago
27/30 George Boole's 200th birthday
The Google Doodle on 2nd November to mark George Boole's contribution to science
28/30 Halloween 2015
Google celebrates Halloween 2015 using an interactive doodle game "Global Candy Cup"
29/30 Prague Astronomical Clock
Google celebrates the 605th anniversary of the Prague Astronomical Clock, one of the oldest functioning timepieces in the world
30/30 Autumnal Equinox
Google marks the autumnal equinox on 23 September 2015
Augustus supposedly wanted his month, August, to have as many days as July, the 31-day month named after Julius Caesar.
As the theory goes. August was then only 29 days long, he took two off February for the benefit of August.
In reality, there is evidence that the direct predecessor of the Gregorian calendar, the Julian Calendar marked February with 28 days before August became a 31-day month.
If someone is born on February 29 in the UK, their legal date of birth is treated on non-leap-years as March 1.Reuse content