According to the search results, the schedule for Big Brother Season 25 in 2023 is as follows:

• Sundays: Taped episodes air from 8:00-9:00 PM EST.
• Tuesdays: Taped episodes air from 8:00-9:00 PM EST.
• Wednesdays: Taped episodes air from 8:00-9:00 PM EST. When Survivor and The Amazing Race return in the fall, the Wednesday episodes will instead shift to air the same time on Tuesdays.
• Thursdays: Live episodes air from 9:00-10:00 PM EST.
• The show airs nightly (except Saturdays) at 9:00 PM on ITV2 and ITVX.
• The exact number of episodes for Season 25 has not been released, but previous seasons have ranged from 35-40 episodes.
• The season began airing on August 2, 2023.
• The season will reportedly last 100 days, with the finale airing on November 9, 2023.
• Episodes are available to stream on Paramount+ the following day.

Therefore, Big Brother Season 25 in 2023 airs taped episodes on Sundays and Wednesdays, live episodes on Thursdays, and will last for 100 days until the finale on November 9, 2023.