Whether you're going in to do your weekly shop, or just fancy a trip under the Christmas lights of Dublin, then Luas is going to be your number one man this Sunday.
Yep, you can ride for free all day long, but there's one very specific rule - you have to wear a Christmas jumper.
With just about a month to go until the big day, the travel bosses are feeling festive and want to try and pull off a world record.
To have the most amount of people in one place wearing a festive sweater is no easy feat, but they did it last year, and want to make 2016 even bigger.
The record attempt will take place on O'Connell Street at 4pm on Sunday, November 27, but if you can't make that, getting to travel around the city for free is a nice bonus.