Harry Potter TV Series

...........As per the official Harry Potter website, Gardiner and Mylod shared that "We have 8 hours to tell the first book, so we can dig into the real depths and crevices and how the language of magic can evolve." With many HBO series having hour-long episodes, this means that Harry Potter season 1 will likely consist of eight episodes. Previous comments and the revealed filming window have indicated that the series is expected to debut in late 2026 or in 2027..........

An eight-hour runtime provides more justification for the Harry Potter books to be adapted as a television series. It is enough of an increase to ensure that the series will have enough time to be the faithful adaptation it has been promised to be. Since the books gradually become much longer, with Harry Potter and the Order of the Phoenix being the longest in the series, it will be intriguing to see if the runtime of later seasons is increased, or if all Harry Potter seasons will adhere to an eight-hour runtime..............

https://screenrant.com/harry-potter-show-season-1-runtime-confirmed/