Dublin has been named one of the top five places in the world to celebrate New Year's Eve.
The city was singled out as preparations get under way for a special extended festival to launch The Gathering.
"The 2013 New Year's Eve Festival in Dublin will be extra special as it marks the start of The Gathering Ireland," Mr Varadkar said.
Thousands of expats are expected to visit Ireland throughout next year, in what will be a year of celebrations.
Communities all over the country have been urged to stage homecoming events, following calls to the Irish diaspora to return to experience the country's cultures and traditions.
The Irish capital was singled out for its annual fireworks display and torch- lit procession of floats, firebreathers, stiltwalkers and, in particular, for this year's extended festival.
"With this positive message going out around the world, I would urge Irish people everywhere to join in the celebrations in Dublin or with their own local festival," Mr Varadkar said.
The main event is a New Year's Eve countdown concert at College Green in the city centre.