SCHEDULED75% CONFIDENCEThe Wikipedia[1] article's infobox gives 23 May 2027, the date fixed by Spain's electoral law for the simultaneous local and regional polling day.
Every Spanish municipality votes on 23 May 2027, alongside regional elections in twelve autonomous communities on the same day.
Circuit Gilles Villeneuve, Ile Notre-Dame, Montreal, Quebec, CanadaFormula 1
SCHEDULED85% CONFIDENCEFormula 1's[2] own 2027 schedule gives this round's weekend as "21 - 23 May"; the Grand Prix is run on the Sunday, the last day of the weekend.
Montreal's island circuit is a run of long straights and chicanes that ends at the Wall of Champions.
Deutsche Bank Park, Mornewegstrasse 1, 60528 Frankfurt am Main, GermanyUEFA
SCHEDULED85% CONFIDENCEUEFA's published host decision: the final "will be played at the FrankFurt Arena in Frankfurt, Germany, on 26 May 2027".[1]
The Europa League is decided at Eintracht Frankfurt's stadium, the ground that watched its own club win the competition in 2022. The final comes ten days before the Champions League decides Europe's top tier.
SCHEDULED75% CONFIDENCEWikipedia[1] lists "May 28, 2027" as the scheduled release date, matching Geek Vibes Nation's[2] 2027 list.
Star Wars: Starfighter is an upcoming American space opera film directed by Shawn Levy and written by Jonathan Tropper. Produced by Lucasfilm and 21 Laps Entertainment, and set to be distributed by Walt Disney Studios Motion Pictures, it is intended to be an installment in the Star Wars franchise and set five years after the events of the film Star Wars: The Rise of Skywalker (2019).
ESTIMATED69% CONFIDENCEGiven as a target, not a fixed date, per en.wikipedia.org[1]: "…n installed. Dogger Bank[2] B wind farm is expected to be complete in 2027. As of 27 July 2026, SSE rep…"
At 3.6 GW, the largest offshore wind farm in the world, sited over a shallow sandbank 130 km off the Yorkshire coast. Estimated date.
National Hockey League, 1185 Avenue of the Americas, New York, NY, USA
ESTIMATED68% CONFIDENCEThe NHL[3] has released only the regular-season schedule; Wikipedia's[2] 2026-27 NHL season page says the playoffs begin in April 2027 and end "with the Stanley Cup Final in June", with no dates, so early June 2027 is an estimate.
Kalshi
The NHL's first 84-game season since 1993-94 runs to 10 April 2027 and ends with a Stanley Cup Final in June. On 20 September 2026 Kalshi had Florida at 13% to repeat as champion, Colorado at 10-11%, and Carolina and Edmonton at 8-9%.
SCHEDULED75% CONFIDENCEGiven as scheduled, per en.wikipedia.org[1]: "…il 2027. Phase 2 is 58% complete and is scheduled for completion in October 2028, when commercial op…"
A monorail crossing the Panama Canal through a new 4 km tunnel to reach the fast-growing west of the city. Estimated date.
SCHEDULED77% CONFIDENCEThe season's bounds are fixed by the National Hurricane Center, not forecast: "The official hurricane season for the Atlantic basin is from June 1 to November 30, but tropical cyclone activity sometimes occurs before and after these dates." The pin therefore ends at the exclusive 00:00Z boundary of 1 December 2027.[1]
The National Hurricane Center's official Atlantic season runs from 1 June to 30 November, the six months in which almost all basin activity falls. An average season brings 14 named storms.
DELAYED6.5 years late59% CONFIDENCEDate has moved, per en.wikipedia.org[1]: "s, the release has been delayed multiple times. In November 2025, Tesla CEO Elon Mus…"
Unveiled in 2017 with claims of a 1.9-second 0-60 and 620-mile range, and delayed every year since. Estimated date.
ESTIMATED50% CONFIDENCEGiven as a target, not a fixed date, per the pin description: "…ng on the Moon since Apollo 17 in 1972, targeting the lunar south pole. Estimated date.…"
The first crewed landing on the Moon since Apollo 17 in 1972, targeting the lunar south pole. Estimated date.
SCHEDULED85% CONFIDENCEUEFA's published host decision: the final "will be played at Besiktas Stadium in Istanbul, Turkey, on 2 June 2027".[1]
Europe's third club competition ends at Besiktas' stadium on the Bosphorus, a ground rebuilt on the site where the club has played since 1947. It is Istanbul's first UEFA club final since the 2023 Champions League final at the Ataturk.
NBA Headquarters, Olympic Tower, 645 Fifth Avenue, New York, NY, USA
ESTIMATED65% CONFIDENCEThe NBA has published only "June 2027" for the Finals; calendar listings put Game 1 on Thursday 3 June 2027, so that day is an estimate rather than a league-confirmed date. Kalshi's[1] market expiry of 31 July 2027 is a settlement buffer, not the game date.
Kalshi
The 2026-27 NBA season ends with the Finals in June 2027. On 20 September 2026 Kalshi's futures board was a two-horse race: Oklahoma City and San Antonio were both priced around 21%, more than double Philadelphia at 9% and New York at 8%. The league has confirmed only the month, with Game 1 widely reported for 3 June.
CONFIRMED93% CONFIDENCEThe Staatliche Museen zu Berlin announced the date itself - "Opening on June 4th 2027" - and the Stiftung Preussischer Kulturbesitz[2] put out a matching press release on 4 May 2026.
Berlin's Pergamonmuseum comes back in stages, and the first of them lands on 4 June 2027: the North Wing and the northern central building reopen, putting the Pergamon Altar back on public view and giving the Museum für Islamische Kunst two full floors. The museum has been under renovation since 2013 as part of the Museumsinsel master plan, and the South Wing stays shut after this - it is not expected back until around 2037.
SCHEDULED76% CONFIDENCEGiven as scheduled on the festival's own site: "Boston Calling[1] Music Festival | Boston, MA | June 4 - 6, 2027 ... SEE YOU IN 2027", matching the organisers' post quoted by Boston.com[3]: "an exciting return on a new weekend: June 4-6, 2027."
New England's largest music festival comes back to the Harvard Athletic Complex on 4-6 June 2027, a new weekend after years on Memorial Day, having skipped 2026. Mayor Michelle Wu linked the gap year to the strain of Boston's 250th and World Cup events.
Riyadh Air Metropolitano, Avenida de Luis Aragonés 4, 28022 Madrid, Spain
SCHEDULED85% CONFIDENCEUEFA.com[2]'s own announcement names the Estadio Metropolitano as the 2027 final venue on 5 June 2027, and Kalshi's[1] market expires that evening.
Kalshi
UEFA has awarded the 2027 Champions League final to the Riyadh Air Metropolitano in Madrid on 5 June 2027, the stadium's second final after 2019. On 20 September 2026 Kalshi's winner market made Barcelona the favourite at about 25%, ahead of Bayern Munich, Arsenal and Real Madrid on 14% and PSG on 12%.
Riyadh Air Metropolitano, Avenida de Luis Aragones 4, 28022 Madrid, SpainUEFA
SCHEDULED85% CONFIDENCEUEFA[2] fixed the host and date years ahead: the final "will be played at the Estadio Metropolitano in Madrid, Spain, on 5 June 2027".
Europe's club season ends in Madrid. The Estadio Metropolitano, Atletico Madrid's home since 2017, hosts the Champions League final for the second time after 2019, when Liverpool beat Tottenham there.
Court Philippe-Chatrier, Stade Roland Garros, 2 Avenue Gordon Bennett, 75016 Paris, FranceFrench Tennis Federation
SCHEDULED83% CONFIDENCEFrom the organiser's published window, "17 May - 6 June 2027", with the women's singles final on the second Saturday as the tournament schedules it every year.[1]
The women's singles final is played on Court Philippe-Chatrier on the tournament's second Saturday, for the Coupe Suzanne-Lenglen. It is the last clay-court title of the season's European spring.
SCHEDULED75% CONFIDENCEWikipedia[1] states "Legislative elections are scheduled to be held in Mexico on 6 June 2027", the first Sunday of June set by Mexican electoral law.
Mexicans elect all 500 members of the Chamber of Deputies on 6 June 2027, the midterm test of Claudia Sheinbaum's supermajority, held alongside state elections.
SCHEDULED85% CONFIDENCEFormula 1's[2] own 2027 schedule gives this round's weekend as "04 - 06 Jun"; the Grand Prix is run on the Sunday, the last day of the weekend.
The slowest, tightest and oldest race on the calendar runs through the streets of Monte Carlo, where qualifying decides most of it.
Court Philippe-Chatrier, Stade Roland Garros, 2 Avenue Gordon Bennett, 75016 Paris, FranceFrench Tennis Federation
SCHEDULED85% CONFIDENCERoland-Garros's[2] own site gives the 2027 edition as "17 May - 6 June 2027"; the men's singles final is the last match of the last day.
The clay-court major ends on Court Philippe-Chatrier, where the men's singles final is played for the Coupe des Mousquetaires. Chatrier has had a retractable roof since 2020, but the surface still decides the tennis: the slowest, longest matches of the year are played here.
Mandalay Bay Convention Center, 3950 South Las Vegas Boulevard, Las Vegas, Nevada 89119, United StatesCisco
SCHEDULED75% CONFIDENCECisco[2][3] Live's[1] site: "Cisco Live 2027 June 6 - 10 in Las Vegas. Be the first to know when registration opens!", its event data naming the Mandalay Bay Convention Center.
Cisco's flagship customer and partner conference is set for 6-10 June 2027 at the Mandalay Bay Convention Center; the 2026 edition in the same city drew more than 20,000 people.
ESTIMATED50% CONFIDENCEClinicalTrials.gov[1] lists 2027-06-07 as the estimated primary completion date; a sponsor's estimate, and trials of this size routinely slip.
Sanofi's phase 3 trial of PCV21 Vaccine in pneumococcal immunization reaches primary completion, the point at which the last participant's primary outcome is measured. The trial enrolled 2,195 participants. This is a phase 3 randomized, modified double-blind study whose purpose is to measure whether 3 lots of the investigational pneumococcal vaccine PCV21 can help the body to develop germ-fighting agents called "antibodies" (immunogenicity) in a similar way (ie, same immune response) when they are given to infants aged from approximately 2 months (42 to 89 days) and are safe compared to a licensed 20-valent pneumococcal vaccine (20vPCV) (Prevnar 20™). The study duration per participant will be up to approximately 17 months. The study vaccines (either PCV21 or 20vPCV) will be administered at approximately 2, 4, 6 and 12 months of age. Cohort A will include randomization to three PCV21 formulation groups or one 20vPCV comparator group (Group 1-4, approximately 896 total participants), whereas Cohort B will include randomization to three PCV21 formulation groups only (Groups 1-3, approximately
Grand Hyatt Manila, 8th Avenue, Bonifacio Global City, Taguig District 2, Taguig, Southern Manila District, Metro Manila, 1635, PhilippinesPLDT
SCHEDULED77% CONFIDENCEPLDT's 2026 notice says 'Per the By-Laws of the Company, the Annual Meeting shall be held on the second Tuesday of June', which in 2027 is 8 June; the 3:00 p.m. Manila (07:00 UTC) start and Grand Hyatt Manila venue repeat the 2025 and 2026 meetings.[1]
PLDT's 2027 annual meeting falls on the second Tuesday of June under its by-laws, where shareholders will elect the board and approve the 2026 financial statements.
SCHEDULED85% CONFIDENCEThe Federal Reserve's[2] published FOMC calendar lists the meeting as "June 8-9" 2027, and Kalshi's[1] market for it strikes at the decision time on the second day. The Fed adds that "Each meeting date is tentative until confirmed at the meeting immediately preceding it".
Kalshi
The FOMC announces its rate decision on the second day of its June 8-9 2027 meeting. The meeting is one of the four in 2027 that comes with a Summary of Economic Projections - the "dot plot" - and a press conference. On 21 September 2026 Kalshi last traded Fed maintains rate 59%, Cut >25bps 28%, Hike 25bps 20%.