Events are taking place at home and abroad marking Bloomsday, celebrating James Joyce and his novel, Ulysses.
Bloomsday, 16 June, is the day depicted in James Joyce's novel Ulysses, named for the central character, Leopold Bloom.
The novel follows the life and thoughts of Leopold Bloom and a host of other characters real and fictional from 8am on 16 June 1904, through to the early hours of the following morning.
Celebrations often include dressing up like characters from the book and in clothes that would have been the style of the era, and events being held to mark the day include readings, performances and visiting the places and establishments referenced in the book.
A rare first edition of Ulysses will also go on display at a hotel in Dublin to mark the day.
The book, to be displayed at the Talbot Hotel in Stillorgan, will be auctioned on Tuesday with a price tag of €70,000.
President Michael D Higgins will address a Bloomsday garden party in Áras an Úachtaráin which will also celebrate the Irish film and Television industry.
The themes for the Garden Parties reflect the themes that President Higgins has chosen for his second term, including citizen action, democratic participation and sustainable development.
Joyce started writing Ulysses in March 1914, but put it aside again to finish his play Exiles.
On 16 June 1915 he wrote to his brother Stanislaus to say he had finished the first episode of Ulysses. After Ulysses was published in 1922, Joyce's friends began to mark 16 June as Bloomsday.
The first Bloomsday celebrated in Ireland was in 1954, the 50th anniversary of the first Bloomsday, when the writers Patrick Kavanagh and Flann O'Brien visited the Martello Tower at Sandycove, Davy Byrne's pub, and 7 Eccles Street.
A full list of events in Dublin can be found on www.bloomsdayfestival.ie