Chronopin：これからの発売日・イベント・大切な日付

ESAがGaiaの第4次データリリースを公開する。ミッション初の主要リリースで、最初の5.5年間の観測を対象とする。位置天文学的な時系列データ、系外惑星リスト、それらを扱うためのソフトウェアが加わる。

TOHO animation STUDIO's The Apothecary Diaries: The Deceased Empress' Treasure, an original film story by Natsu Hyuuga, opens in Japanese theaters.

Twenty years after it was announced, the Guggenheim Abu Dhabi opens on 11 December 2026 as the largest museum in the Guggenheim family - about 80,000 square metres, against roughly a quarter of that in New York. Frank Gehry arranged it around a single tall atrium with galleries threaded between ten sculptural cones, nine sheathed in stainless steel mesh and one in onyx and glass, so the roofline reads as a cluster of towers from across the Culture District.

Nike’s “Purple Venom” colorway of Caitlin Clark’s Caitlin 1 signature basketball shoe goes on sale December 12 for $140 in adult sizes.

On December 31, 2026 Polymarket settles who officially holds Venezuela's head of state office. Acting president Delcy Rodríguez was sworn in on January 5 after U.S. troops captured Nicolás Maduro, and both still claim it: on 20 September 2026 the market's outcome row put Maduro at 47% and showed no percentage at all beside Rodríguez, only a 48¢ Buy Yes price.

Finland's Posiva began drilling the first deposition hole at the Onkalo repository, a step toward becoming the world's first facility to permanently bury spent nuclear fuel.

Kalshi’s largest crypto event settles on Bitcoin’s price at 12:00 a.m. ET on January 1, 2027, splitting the outcome into $5,000 buckets. On 20 September 2026, with BTC near $80,800, the market’s favourites were $75,000–$80,000 at 14.9% and $80,000–$85,000 at 13.9% — a year that ends roughly where it stood.