The same as any first world country. It varies based on your income and cultural influnces.
It depends what your style is but we have no particular dress code.
Traditional Dress of Ireland http://www.gowealthy.com/gowealthy/wcms/en/home/articles/travel/culture/Traditional-dress-of-Ireland-MdehXbCxQa.html
some traditions that they do in Ireland is that the bride must wear a white dress to resemble her purity also they always have a tree up and decorated every year for Christmas.
Women in modern Ireland dress much as women do in the U.S. Jeans and t-shirts are acceptable, business clothing is standard for work, and sweaters, dress slacks, and dresses are also worn.
zara
There are several places to purchase a fancy dress in Ireland. There are online retailers such as thecostumeshop, fancydressstore and partyworld. There are also stores one can personally go to such as Pacsun and Bananas fancy dress shop.
There is no particular traditional Christmas attire in Ireland. As there are a lot of special events and parties on, people will dress up well to go to these events, but there is no special attire used. They will just have their best clothes on.
They dress up and go around to collect things from houses. They have Halloween parties. They play Halloween games. They have bonfires and fireworks.
Dress, Software, Bottled food, Wine
You might dress up stylishly. You could make a splash and dress up daringly. Or you may dare to dress up barely. You could dress up horribly. You may like to dress up cutely. Or, perhaps dress up acutely.
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dress up i think it is both because it depends on the the way the person that pronounced it said it