This is the first Good Friday since 1927 that venues can serve alcohol
The Vintners’ Federation of Ireland (VFI) say this Friday is "an historic day for Irish pubs".
It is first time in over 90 years that licensed venues are open and permitted to serve alcohol.
The group has welcomed legislation that allows pubs to serve alcohol on Good Friday.
It says removing the ban was about "introducing choice, both for the customer and the publican."
VFI chief executive Padraig Cribben says: "The Good Friday ban is from a different era and is rightfully consigned to history.
"Like all other businesses who were never subject to a ban, publicans now have a choice to open.
"Pubs opening on Good Friday is good news, both for publicans and their customers but also for the many tourists who visit Ireland over the Easter weekend, who in the past would find the pubs closed during a major holiday."
Brian Conlon from Slattery’s pub pulls one of the first legal pints at 7am this Good Friday morning. The ban on selling alcohol on this day was lifted in January #historic #GoodFriday pic.twitter.com/Z8EPTe5PKu— Gail Conway (@Gailiana) March 30, 2018
Shane McShea was the first customer @SlatterysBar to tuck into a ‘fry and a pint’ shortly after 7am today #GoodFriday The ban on the sale of alcohol has been lifted after 91 years pic.twitter.com/ATDStapfAG— Gail Conway (@Gailiana) March 30, 2018
The VFI says the extra day's business is expected to generate over €40m in sales.
It says Good Friday will also generate over €7m in VAT and excise duty contributions to the exchequer.
Mr Cribben says the Intoxicating Liquor Bill 2017, which removed the prohibition on selling alcohol during Good Friday, reflects "Ireland’s status as a mature nation."
"The Good Friday ban was introduced a lifetime ago in 1927 and we took the view that such a piece of archaic and discriminatory legislation needed to be removed.
"Times have changed and the new law reflects this reality."