Across Wales, people will be celebrating St David's Day in honour of the Welsh patron saint, and Google has marked the occasion with a Doodle.
Welsh schools will be holding eisteddfodau - music, song and poetry competitions.
Some people even wear leeks on their clothing to celebrate their patron saint.
This is not a public holiday in Wales or the rest of the UK.
Here are five things you may not not know about St David:
1. St David was actually Welsh
He was born around 500 AD in Caerfai in Pembrokshire, Wales to Sandde, Prince of Powys and Non, daughter of a chieftain.
Comparing nationality, St Andrew was Palestinian, St Patrick was a Romano-British missionary, while St George was a Roman soldier of Greek extraction.
Indeed, of the patron saints of the British Isles, only St David and St Patrick had visited the country they are the patron saint for.
2. St David's Day marks the date of his death
St David was the Welsh bishop for the city of Menevia, in Pembrokshire - now called St Davids .
According to historical sources, he died on 1 March ,589 AD.
He was officially recognised as a saint by Pope Callixtus in 1120.
3. St David was a vegetarian
Nicknamed the "water drinker", St David only drank water and ate only herbs, vegetables and bread.
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
4. Welsh regiments eat raw leeks on 1 March
Historically Welsh regiments such as the Queen's Dragoon Guards eat raw leeks to celebrate their patron saint.
Before a battle against the Saxons, legend has it, David advised Welsh warriors to wear a leek in his hat so that they could distinguish themselves from their enemies.
Thus inspiring the tradition of wearing leeks on his name day.
5. His symbol is not the leek or daffodil
His symbol is actually a dove normally resting on a shoulder as he stands on a hill.
It is believed while speaking to a crowd of people at the synod of Brefi, a hill arose at the very spot he had preached from.Reuse content