Global Big Day
When: Next: expected Saturday 8 May 2027 (it is held on a Saturday in early to mid May; in 2026 it was 9 May)eBird announces each year’s date in the spring; 8 May 2027 is our estimate, not yet confirmed.
A single day in May when birders everywhere go out and record every bird they can, submitting checklists to eBird.
How to take part
- Go birding for any length of time during the 24 hours, from midnight to midnight local time.
- Submit what you saw as eBird checklists, on the website or in the eBird app.
Organised by the Cornell Lab of Ornithology (eBird). Full details and registration: ebird.org.
Bring a checklist
Take the checklist for your state or country on your phone: it works without signal, keeps counts, and exports in eBird’s import format.
Choose your state or country checklistDates checked on 2026-10-13 against the organiser’s page. Always confirm with the organiser before you go.
More dates for birders
- Great Backyard Bird Count · 12–15 February 2027
- World Migratory Bird Day · Next: expected 8 May and 9 October 2027 (the second Saturdays of May and October; in 2026, 9 May and 10 October)
- Christmas Bird Count · 14 December 2026 – 5 January 2027 (the 127th count)
- Aussie Backyard Bird Count · 19–25 October 2026
- RSPB Big Garden Birdwatch · Next: expected 29–31 January 2027 (the last weekend of January; in 2026 it was 23–25 January)