CoverManager, an online platform that manages reservations for thousands of Spanish restaurants, reports that half the dinner bookings now are for before 9 p.m., compared with 27 percent a decade ago. TheFork, a similar platform, said its 8 p.m. bookings in Spain have nearly tripled from 2019, while 10 p.m. reservations have halved.

In Spanish homes, too, there are subtle signs of a shift. A government survey conducted in 2024 in the Catalonia region suggests that people there are starting their evening routines, including dinnertime, moderately earlier compared with 2010.

Here is more from Jonathan Wolffe at the NYT.  I learned also from the article that the late dining tradition is in part an artifact of the post WWII era in Spain.