People in Ireland as well as abroad celebrate St Patrick's day every year on March 17 to honour his role in bringing Catholicism to the country.

Participants are seen during the St. Patrick's Day parade in Dublin, Ireland, on March 17, 2018.
Participants are seen during the St. Patrick's Day parade in Dublin, Ireland, on March 17, 2018. (Reuters)

Thousands of people celebrated St Patrick's Day or "The fest of St Patrick" in a colourful way in the island of Ireland to honour his role in bringing Catholicism to the country.

The celebrations are held every year on the 17th of March which is thought to be the date St Patrick died.

Not only is the celebration marked in Ireland, it is celebrated across the world by the Irish diaspora. And many who are not Irish or Catholic often join in the festivities, including the British Royal family.

Britain's Catherine, Duchess of Cambridge attaches shamrock to the collar of mascot Irish Wolfhound Domhnall at the presentation of Shamrock to the 1st Battalion Irish Guards, at a St Patrick's Day parade at Cavalry Barracks in Hounslow, London on March 17, 2018.
Britain's Catherine, Duchess of Cambridge attaches shamrock to the collar of mascot Irish Wolfhound Domhnall at the presentation of Shamrock to the 1st Battalion Irish Guards, at a St Patrick's Day parade at Cavalry Barracks in Hounslow, London on March 17, 2018. (Reuters)
Britain's Catherine, Duchess of Cambridge and Prince William stand on the review dias at the presentation of Shamrock to the 1st Battalion Irish Guards, at a St Patrick's Day parade at Cavalry Barracks in Hounslow, London, on March 17, 2018.
Britain's Catherine, Duchess of Cambridge and Prince William stand on the review dias at the presentation of Shamrock to the 1st Battalion Irish Guards, at a St Patrick's Day parade at Cavalry Barracks in Hounslow, London, on March 17, 2018. (Reuters)
A participant is seen during the St. Patrick's Day parade in Dublin, Ireland, on March 17, 2018.
A participant is seen during the St. Patrick's Day parade in Dublin, Ireland, on March 17, 2018. (Reuters)
An Irish Wolfhound participates in the St. Patrick's Day parade in Dublin, Ireland, on March 17, 2018.
An Irish Wolfhound participates in the St. Patrick's Day parade in Dublin, Ireland, on March 17, 2018. (Reuters)
A woman with a leprechaun on her hat watches the St. Patrick's Day parade in Dublin, Ireland, on March 17, 2018.
A woman with a leprechaun on her hat watches the St. Patrick's Day parade in Dublin, Ireland, on March 17, 2018. (Reuters)
Actor Mark Hamill attends the St. Patrick's Day parade in Dublin, Ireland, on March 17, 2018.
Actor Mark Hamill attends the St. Patrick's Day parade in Dublin, Ireland, on March 17, 2018. (Reuters)

In the US city of Chicago, the Chicago River was dyed a bright shade of green, kicking off the city's St. Patrick's Day festivities.

Thousands of people lined the riverfront downtown Chicago on Saturday to see the dyeing, a tradition for the holiday that dates to 1962.

A parade was also scheduled.

Rowers navigate the Chicago River shortly after it was dyed green in celebration of St. Patrick's Day on March 17, 2018 in Chicago.
Rowers navigate the Chicago River shortly after it was dyed green in celebration of St. Patrick's Day on March 17, 2018 in Chicago. (AFP)

And of course, celebrations took place in New York, with Ireland's Prime Minister Leo Varadkar taking part in that city's St Patrick's Day parade.

Prime Minister of Ireland Leo Varadkar attends the 2018 New York City St. Patrick's Day Parade on March 17, 2018 in New York City.
Prime Minister of Ireland Leo Varadkar attends the 2018 New York City St. Patrick's Day Parade on March 17, 2018 in New York City. (AFP)
Source: TRTWorld and agencies