London'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 London'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 London'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 London's own year — not a headcount.
joint #1 New Year's Eve fireworks →
31 December 2026 — expected — not yet confirmed
New Year's Eve fireworks is joint busiest of London's 5 verified major events — its day is Packed, busier than 99% of London's year.
The 2026 New Year's Eve fireworks in London is expected on 31 Dec 2026 — the date can move; expect Packed days — busier than 99% of London's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
joint #1 Notting Hill Carnival →
29–30 August 2027 — we checked these dates against the organiser's own site
Notting Hill Carnival is joint busiest of London's 5 verified major events — its busiest day is Packed, busier than 99% of London's year.
The 2027 Notting Hill Carnival in London runs 29–30 Aug 2027, confirmed; expect Packed days — busier than 99% of London's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
joint #1 TCS London Marathon (first two-day edition) →
24–25 April 2027 — we checked these dates against the organiser's own site
TCS London Marathon is joint busiest of London's 5 verified major events — its busiest day is Packed, busier than 99% of London's year.
The 2027 TCS London Marathon in London runs 24–25 Apr 2027, confirmed; expect Packed days — busier than 99% of London's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
#4 WTM London (World Travel Market) →
3–5 November 2026 — we checked these dates against the organiser's own site
WTM London ranks #4 of London's 5 verified major events by crowd impact — its busiest day is Packed, busier than 92% of London's year.
The 2026 WTM London in London runs 3–5 Nov 2026, confirmed; expect Packed days — busier than 92% of London's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
#5 DSEI UK 2027 →
7–10 September 2027 — we checked these dates against the organiser's own site
DSEI UK 2027 ranks #5 of London's 5 verified major events by crowd impact — its busiest day is Busy, busier than 72% of London's year.
The DSEI UK 2027 in London runs 7–10 Sep 2027, confirmed; expect Busy days — busier than 72% of London's year. (Avoid-Crowds, as of 2026-10-13; recomputed nightly.)
Planning London 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.