Staff in Brown Thomas in Dublin, Cork and Limerick have been decking out Christmas shops which will open for business tomorrow.
Brown Thomas said the decision to open the shop was in response to consumer demand.
It found that a lot of people like buying Christmas decorations at this time of year.
The store expects that many of the decorations on display will be sold out long before Halloween.
Brown Thomas creative director John Redmond said they would be recreating a traditional Christmas market at their flagship Dublin store.
The market will be stocked over the coming weeks with gift ideas, fragrances, crackers, candles and festive food.
Some shoppers thought the unseasonal Noel cheer at the tail-end of a washed out summer and four months before Christmas Day was a bit too much.
One woman looked stung when a helpful salesperson offered to sell one of the Christmas trees on display in Grafton Street yesterday.
“I don’t do Christmas,” she said, before turning quickly to leave the area.
There was a flutter on Twitter yesterday when people first spotted staff putting trees and other Christmas stock on display.
* “Someone needs to tell Brown Thomas it’s too early for Christmas decorations.”
* “Good God. Kids aren’t even back to school yet. Not a good idea!”
There were also people who tweeted that they thought it was a good idea to open a Christmas shop this week.
* “I think it is great: Well done BT: Roll on Christmas!”