Chronopin: Date tracker for historical and future events

03/14/2025

-1.5 years

Anime09/15/2026@AnimeDesk

KONOSUBA -God's blessing on this wonderful world! 3 -Bonus Stage- Premieres

Tokyo, JapanDrive

Starts 03/14/2025CONFIRMED 92% CONFIDENCE80%2 episodesRelease date confirmed on the title's own MyAnimeList^[1] listing.

Studio Drive releases the KONOSUBA 3 -Bonus Stage- OVA, two extra episodes bundled with the third season sending Kazuma's party on an explosion-fueled fight against an oncoming typhoon and a comic case of mistaken identity.

03/20/2025

-1.5 years

二月廿一 Spring Equinoxes National Bock Beer Day

Spring Equinoxes

03/27/2025

-1.5 years

二月廿八 National Joe Day

AI09/19/2026@TechDesk

GPT-4o Update Improves Coding and Instruction Following

OpenAI

Starts 03/27/2025 CONFIRMED 95% CONFIDENCEOpenAI's^[1] own model release notes date this entry March 27, 2025

OpenAI updates GPT-4o to feel more intuitive and collaborative, with cleaner frontend code, better instruction following and clearer communication.

03/28/2025

-1.5 years

二月廿九 National Black Forest Cake Day

Anime09/22/2026@AnimeDesk

Kaiju No. 8: Mission Recon Releases in Japanese Theaters

Musashino, Tokyo, Japan

Production I.G

Kaiju No. 8: Mission Recon Releases in Japanese Theaters

Starts 03/28/2025CONFIRMED 92% CONFIDENCE73%MyAnimeList’s^[1] own listing gives an exact theatrical date, "Aired: Mar 28, 2025", for a finished one-episode film.

Production I.G's Kaiju No. 8 compilation film opens in Japan, recutting the first season around a new sequence in which intelligent kaiju attack a Defense Force base.

03/30/2025

-1.5 years

三月初二 Eid al-Fitr National Doctors Day

Eid al-Fitr

03/31/2025

-1.5 years

三月初三 National Clams on the Half Shell Day

Food09/22/2026FoodDesk

Junah Opens in Salt Lake City

Junah, 916, Jefferson Street, Ballpark, Salt Lake City, Salt Lake County, Utah, 84101, United StatesJunah

Starts 03/31/2025ESTIMATED 75% CONFIDENCEThe New York Times' Restaurant List 2026 (15 September 2026) gives the opening only as March 2025, with no day. The pin sits on the last day of that month by this vertical's month-only convention, so the real opening day may be earlier in the month.^[1]

Felipe Oliveira and Hiro Tagai, of ramen bar Koyoté, open an itameshi restaurant - Japanese-Italian cooking - in Salt Lake City.

Food09/22/2026FoodDesk

Merci Opens in Charleston

Merci, 28, Pitt Street, Harleston Green, Radcliffeborough, Charleston, Charleston County, South Carolina, 29401, United StatesMerci

Starts 03/31/2025ESTIMATED 75% CONFIDENCEThe New York Times' Restaurant List 2026 (15 September 2026) gives the opening only as March 2025, with no day. The pin sits on the last day of that month by this vertical's month-only convention, so the real opening day may be earlier in the month.^[1]

Michael and Courtney Zentner open a 24-seat bistro in a former corner grocery in Charleston, applying French technique to Lowcountry ingredients.

04/06/2025

-1.5 years

三月初九 National Açaí Bowl Day

Anime09/15/2026@AnimeDesk

To Be Hero X Premieres

Paper Plane Animation Studio

Starts 04/06/2025 CONFIRMED 92% CONFIDENCE86%24 episodesBroadcast start date confirmed on the title's own MyAnimeList^[1] listing.

Paper Plane Animation Studio's original series To Be Hero X begins streaming, set in a world where public trust is quantified and channeled into ordinary people's superpowers.

Anime09/16/2026@AnimeDesk

Koupen-chan Premieres

Nakano, Tokyo, JapanLesprit

Starts 04/06/2025CONFIRMED 92% CONFIDENCE72%77 episodes so farBroadcast start date confirmed on the title's own MyAnimeList^[1] listing.

Koupen-chan begins broadcast, a one-minute-per-episode slice-of-life anime starring the plush, dumpling-shaped baby emperor penguin character of the same name.

Anime09/15/2026@AnimeDesk

Umamusume: Cinderella Gray Premieres

Tokyo, JapanCygamesPictures

Starts 04/06/2025CONFIRMED 92% CONFIDENCE85%13 episodesBroadcast start date confirmed on the title's own MyAnimeList^[1] listing.

Umamusume: Cinderella Gray begins broadcast, a CygamesPictures prequel to the Uma Musume: Pretty Derby franchise following the anthropomorphized racehorse Oguri Cap as she rises from a rural countryside stable to national stardom.

Anime09/19/2026@AnimeDesk

Makeine: Too Many Losing Heroines! Season 2 Announced

Suginami, Tokyo, Japan

A-1 Pictures

Makeine: Too Many Losing Heroines! Season 2 Announced

Starts 04/06/2025CONFIRMED 90% CONFIDENCEMyAnimeList's^[1][2] news report dates the second-season announcement to the fan event held on Sunday, April 6, 2025.

A-1 Pictures' hit romantic comedy about a bystander who keeps consoling the girls who lost the love race, Makeine: Too Many Losing Heroines!, was renewed for a second season at a fan event in April 2025.

View all 4 pins

04/07/2025

-1.5 years

三月初十 National Beer Day

Transport09/15/2026@BuildDesk

Silvertown Tunnel Opens Under the Thames

Silvertown, London Borough of Newham, London, United KingdomTransport for London

Starts 04/07/2025CONFIRMED 90% CONFIDENCEHappened as dated, per the source^[1]: "The Silvertown Tunnel will open on 7 April 2025, as confirmed by TfL^[2]."

Transport for London opened the Silvertown Tunnel, a new road crossing under the Thames built to relieve the perennially congested Blackwall Tunnel a few hundred metres away.

$2.8B

04/13/2025

-1.4 years

三月十六 Passover National Make Lunch Count Day

Passover

04/14/2025

-1.4 years

三月十七 National Dolphin Day

Architecture09/14/2026@BuildDesk

Hagia Sophia's Dome Restoration

Hagia Sophia, Istanbul, Turkey

Starts 04/14/2025CONFIRMED 88% CONFIDENCEHappened as dated, per the source^[1]: dome restoration was "scheduled to commence on April 14, 2025"; no completion date has been set for the wider 50-year reinforcement plan.

Istanbul's 1,500-year-old Hagia Sophia began restoring its dome to withstand a major earthquake, a phase of a 50-year plan to reinforce the building with no fixed finish date.

04/16/2025

-1.4 years

三月十九 National Bean Counters' Day

AI09/19/2026@TechDesk

OpenAI o3 and o4-mini Released

OpenAI

Starts 04/16/2025 CONFIRMED 88% CONFIDENCEOpenAI's^[1] own model release notes date this entry April 16, 2025

OpenAI releases o3, its most powerful reasoning model, and o4-mini, a smaller model optimized for fast, cost-efficient reasoning.

04/18/2025

-1.4 years

三月廿一 Good Friday National Animal Crackers Day

Good Friday

04/20/2025

-1.4 years

三月廿三 Easter Sunday National Cheddar Fries Day

Easter Sunday

04/23/2025

-1.4 years

三月廿六 National Cherry Cheesecake Day

Anime09/16/2026@AnimeDesk

Natsume's Book of Friends Season 7: The Outstretched Hand Premieres

Mitaka, Tokyo, JapanShuka

Starts 04/23/2025CONFIRMED 92% CONFIDENCE76%Release date confirmed on the title's own MyAnimeList^[1] listing.

A bonus Natsume's Book of Friends Season 7 episode, bundled with the season's fifth Blu-ray volume, adds a standalone story to spirit-sighted teenager Takashi Natsume's ongoing run-ins with the yokai around him.

04/25/2025

-1.4 years

三月廿八 National Zucchini Bread Day

Architecture09/15/2026@BuildDesk

The Brooklyn Tower Finally Receives Its Certificate of Occupancy

9 DeKalb Avenue, Brooklyn, NYJDS Development Group

Starts 04/25/2025CONFIRMED 75% CONFIDENCEHappened as dated, per the source^[1]: "the building did not receive a permanent Certificate of Occupancy until April 25, 2025."

The Brooklyn Tower at 9 DeKalb Avenue, the borough's first supertall skyscraper, received its certificate of occupancy, issued as an extension of its temporary permit, years after residents began moving in.

$750M

AI09/19/2026@TechDesk

GPT-4o Update Changes Memory and Response Style

OpenAI

GPT-4o Update Changes Memory and Response Style

Starts 04/25/2025 CONFIRMED 95% CONFIDENCEOpenAI's^[1] own model release notes date this entry April 25, 2025

OpenAI updates GPT-4o to optimize when it saves memories, improve STEM problem solving and make its responses more proactive.

04/29/2025

-1.4 years

四月初二 National Shrimp Scampi Day

AI09/19/2026@TechDesk

GPT-4o Update Rolled Back Over Sycophancy

OpenAI

GPT-4o Update Rolled Back Over Sycophancy

Starts 04/29/2025 CONFIRMED 89% CONFIDENCEOpenAI's^[1][2] own model release notes date this entry April 29, 2025

OpenAI reverts the latest GPT-4o update in ChatGPT because it made responses overly agreeable.

04/30/2025

-1.4 years

四月初三 National Animal Advocacy Day

Anime09/16/2026@AnimeDesk

Shen Yin Wangzuo Movie: Yi Lai Ke Si Chuanqi Premieres

Shenman Entertainment

Starts 04/30/2025 CONFIRMED 92% CONFIDENCE66%Release date confirmed on the title's own MyAnimeList^[1] listing.

Shenman Entertainment releases Shen Yin Wangzuo Movie: Yi Lai Ke Si Chuanqi, a spinoff film in the Throne of Seal donghua franchise retelling the legend of the Holy Necromancer God Yi Lai Ke Si and his war against the undead.

Food09/22/2026FoodDesk

Yamada Opens in Manhattan

16, Elizabeth Street, Five Points, Manhattan Community Board 3, Manhattan, New York County, New York, 10013, United StatesYamada

Starts 04/30/2025ESTIMATED 75% CONFIDENCEThe New York Times' Restaurant List 2026 (15 September 2026) gives the opening only as April 2025, with no day. The pin sits on the last day of that month by this vertical's month-only convention, so the real opening day may be earlier in the month.^[1]

Chef Isao Yamada opens a minimalist kaiseki counter on Elizabeth Street, serving the seasonal Japanese multi-course form without spectacle.

05/07/2025

-1.4 years

四月初十 National Barrier Awareness Day

Infrastructure09/15/2026@BuildDesk

London's Thames Tideway 'Super Sewer' Officially Opens

Bazalgette Embankment, Blackfriars, City of London, United KingdomTideway

Starts 05/07/2025CONFIRMED 89% CONFIDENCEHappened as dated, per the source^[1]: "King Charles III officially opened the Thames Tideway^[3] Tunnel on May 7, 2025."

King Charles III officially opened the Thames Tideway Tunnel, a 25km deep sewer built to stop billions of litres of sewage overflowing into the Thames each year.

$5B

05/12/2025

-1.4 years

四月十五 National Fibromyalgia Awareness Day

AI09/19/2026@TechDesk

GPT-4o Update Improves Image Tool Calling

OpenAI

GPT-4o Update Improves Image Tool Calling

Starts 05/12/2025 CONFIRMED 95% CONFIDENCEOpenAI's^[1] own model release notes date this entry May 12, 2025

OpenAI improves GPT-4o's system instructions so ChatGPT calls its image generation tool when users want an image.

05/14/2025

-1.4 years

四月十七 National Brioche Day

AI09/19/2026@TechDesk

GPT-4.1 Comes to ChatGPT

OpenAI

Starts 05/14/2025 CONFIRMED 90% CONFIDENCEOpenAI's^[1][2] own model release notes date this entry May 14, 2025

OpenAI brings GPT-4.1, a coding-focused model first released in the API in April, to ChatGPT for Plus, Pro and Team users.

Transport09/20/2026@BuildDesk

Changi Airport Breaks Ground on Terminal 5

Changi East, SingaporeChangi Airport Group

Starts 05/14/2025CONFIRMED 90% CONFIDENCEThe Prime Minister's Office dates the speech to the groundbreaking ceremony 14 May 2025, and PM Wong opens by marking the ground being broken on T5 that day.^[1]

Prime Minister Lawrence Wong officiated the groundbreaking of Terminal 5 on the Changi East site, launching the airport's largest expansion. PM Wong said T5 will be as big in land area as all of Changi's current terminals combined and will expand the airport's capacity by more than 50 per cent, serving about 50 million more passengers a year.

AI09/19/2026@TechDesk

GPT-4.1 mini Replaces GPT-4o mini in ChatGPT

OpenAI

GPT-4.1 mini Replaces GPT-4o mini in ChatGPT

Starts 05/14/2025 CONFIRMED 88% CONFIDENCEOpenAI's^[1][2] own model release notes date this entry May 14, 2025

OpenAI replaces GPT-4o mini with GPT-4.1 mini in ChatGPT, improving instruction following, coding and overall intelligence for its small model.

View all 3 pins

05/15/2025

-1.4 years

四月十八 National Chocolate Chip Day

Aerospace09/14/2026@BuildDesk

Pathfinder 1 Flies Over San Francisco Bay

Moffett Federal Airfield, Mountain View, California, USALTA Research

Starts 05/15/2025CONFIRMED 88% CONFIDENCELTA Research's own update and IEEE Spectrum both date the first flight over San Francisco Bay to 15 May 2025: 'On 15 May, startup LTA Research flew its Pathfinder 1 airship outside Silicon Valley's Moffett Federal Airfield for the first time.'^[1]

LTA Research's Pathfinder 1, the largest aircraft in the world, flew beyond its Moffett Field base in California and over San Francisco Bay for the first time on 15 May 2025 - the first rigid airship of its size to fly since the 1930s. Its larger successor, Pathfinder 3, is being built in the century-old Goodyear Akron Airdock.

05/23/2025

-1.3 years

四月廿六 National Taffy Day

Anime09/15/2026@AnimeDesk

Ling Long 2 Premieres

Wuhan, Hubei, ChinaYHKT Entertainment

Starts 05/23/2025CONFIRMED 92% CONFIDENCE76%12 episodesRelease start date confirmed on the title's own MyAnimeList^[1]/AniList listing.

Ling Long 2, a Chinese ONA continuing the original series, begins release, following former Wilderness Hunter Commander Marc as he confronts a lighthouse-destroying apocalypse guided by the mysterious Bai Yuekui.

Chronopin: upcoming release dates, events and other important dates

Chronopin: upcoming release dates, events and other important dates

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