Copenhagen St.Patrick 's Day Parade 17th March 2012: The parade will start from City Hall at. 17.00 led by St. Patrick and ends at City Hall around. 17.45. The requirement to participate in the parade is to wear something green: a hat, an umbrella, a scarf, green hair ... Only imagination limits. Discover what the Irish Environment in Copenhagen has to offer in the eigth Copenhagen Saint Patrick's Day Parade invites children and adults of all nationalities to participate in the celebration of the Irish national day in the Town Hall on Thursday 17 March, 2012. Festive afternoon for the whole family City Hall will be buzzing with traditional Irish music and dance from 15.30. Children can get a free St. Patrick's Day face painting. It would also be possible to buy green St. Patrick's Day hats and accessories to walk in the parade or celebrate the day.