Nearly half of HBO Max subscribers watched Wonder Woman 1984 on Christmas Day 2020

 "On HBO Max, anticipation for Wonder Woman 1984 was apparent, with nearly half of the platform’s retail subscribers viewing the film on the day of its arrival, along with millions of wholesale subscribers who have access to HBO Max via a cable, wireless, or other partner services. HBO Max also saw the total viewing hours on Friday more than triple in comparison to a typical day in the previous month.

“Wonder Woman 1984 broke records and exceeded our expectations across all of our key viewing and subscriber metrics in its first 24 hours on the service, and the interest and momentum we’re seeing indicates this will likely continue well beyond the weekend,” said Andy Forssell, Executive Vice President and General Manager, WarnerMedia Direct-to-Consumer. “During these very difficult times, it was nice to give families the option of enjoying this uplifting film at home, where theater viewing wasn’t an option.”"

Source: Press release from Warner Media, 27th December 2020

Note - HBO Max had over 12m subscribers in early December 2020, but has probably added millions more since the deal to stream Warner movies was announced - say 20-30m paying subscribers - so I would estimate that something like 10-15m watched Wonder Woman 1984 on Christmas Day