Dublin's big events, and how busy they make the city
Every event here is verified by a person, dated from its own organiser, and set against Dublin's day-by-day crowd forecast — so they can be ranked on one scale. "Major" here means an event we have checked and approved as one of Dublin's biggest, whose days our own forecast reads Busy or Packed — or, for now, sit beyond the forecast window. See the city, day by day →
Calm · Lively · Busy · Packed rank a day against Dublin's own year — not a headcount.
joint #1 Irish Life Dublin Marathon →
25 October 2026 — we checked these dates against the organiser's own site
Irish Life Dublin Marathon is joint busiest of Dublin's 7 verified major events — its day is Packed, busier than 99% of Dublin's year.
The 2026 Irish Life Dublin Marathon in Dublin runs 25 Oct 2026, confirmed; expect Packed days — busier than 99% of Dublin's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
joint #1 Six Nations 2027 - Ireland home fixtures (Aviva Stadium) →
5 Feb · 13 Mar 2027 — we checked these dates against the organiser's own site
Six Nations 2027 is joint busiest of Dublin's 7 verified major events — its busiest day is Packed, busier than 99% of Dublin's year.
The Six Nations 2027 - Ireland home fixtures in Dublin runs 5 Feb · 13 Mar 2027, confirmed; expect Packed days — busier than 99% of Dublin's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
joint #1 St Patrick's Festival →
17 March 2027 — we checked these dates against the organiser's own site
St Patrick's Festival is joint busiest of Dublin's 7 verified major events — its day is Packed, busier than 99% of Dublin's year.
The 2027 St Patrick's Festival in Dublin runs 17 Mar 2027, confirmed; expect Packed days — busier than 99% of Dublin's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
joint #1 St Patrick's Festival Dublin →
13–17 March 2027 — we checked these dates against the organiser's own site
St Patrick's Festival Dublin is joint busiest of Dublin's 7 verified major events — its busiest day is Packed, busier than 99% of Dublin's year.
The 2027 St Patrick's Festival Dublin in Dublin runs 13–17 Mar 2027, confirmed; expect Packed days — busier than 99% of Dublin's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
#5 Dublin Pride Festival and Parade →
23–27 June 2027 — we checked these dates against the organiser's own site
The Parade ranks #5 of Dublin's 7 verified major events by crowd impact — its busiest day is Packed, busier than 93% of Dublin's year.
The 2027 Dublin Pride Festival and Parade in Dublin runs 23–27 Jun 2027, confirmed; expect Packed days — busier than 93% of Dublin's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
joint #6 European Political Community summit 2026 →
12 November 2026 — we checked these dates against the organiser's own site
European Political Community summit 2026 ranks joint #6 of Dublin's 7 verified major events by crowd impact — its day is Busy, busier than 65% of Dublin's year.
The European Political Community summit 2026 in Dublin runs 12 Nov 2026, confirmed; expect Busy days — busier than 65% of Dublin's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
joint #6 Informal meeting of EU leaders 2026 →
13 November 2026 — we checked these dates against the organiser's own site
Informal meeting of EU leaders 2026 ranks joint #6 of Dublin's 7 verified major events by crowd impact — its day is Busy, busier than 65% of Dublin's year.
The Informal meeting of EU leaders 2026 in Dublin runs 13 Nov 2026, confirmed; expect Busy days — busier than 65% of Dublin's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
Katie Taylor v Flora Pili (Undisputed World Title Farewell, Croke Park) →
5 September 2026 — this edition has passed
The 2026 Katie Taylor v Flora Pili in Dublin has passed; no future date is known yet. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
Not yet rankable — its days sit beyond the current forecast window, so we have no measured footprint to rank it by.
Planning Dublin around these dates? Timed entries and tours matched to the day's forecast
Who writes the city guides · Disclaimer — event dates can change; expected dates are labelled and can move.