Chronopin: upcoming release dates, events and other important dates

ESA publishes the fourth Gaia data release, the mission's first principal release, covering the first 5.5 years of observations. It adds astrometric time series, an exoplanet list and the software to work with them.

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.

Kalshi’s year-high ladder for Ethereum settles on the highest price ETH touches in 2026. On 20 September 2026, with ether near $2,600, traders gave $3,500 a 30% chance, $4,000 22% and $5,000 9%. Polymarket’s equivalent book was a little more optimistic, pricing a touch of $3,000 at 59.5%.

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.