St Patrick'S Day 2025 London Celebrations. Celebrate st patrick's day 2025 in london this march with the mayor's st patrick’s day parade and other parties, celebrations and events. Representatives of britain, ireland and dozens of other counties participate in the parade.

12pm come and celebrate london’s st patrick’s day festival on sunday 17 march in trafalgar square. In great britain, the feast is a regular day, but irish culture is very vibrant there.