Context:
In July 2021, after 25 seasons as members of the Big 12, Texas and rival Oklahoma accepted invitations to join
the Southeastern Conference (SEC) no later than the 2025 season. In February 2023, the Big 12 announced that the
two schools had negotiated a combined $100 million early termination fee in order to leave for the SEC a year
before the schools' media rights deal with the Big 12 was set to expire. The Longhorns football team will
continue competing in the Big 12 through the 2023 season before moving to the SEC in 2024.

Input:
In what month and year did the Texas Longhorn's accept an invitation to the SEC?

Output:

Based on the context provided, the Texas Longhorns accepted an invitation to 
join the SEC in August 2023. Here's why: The Big 12 announced in February 2023 
that Texas and Oklahoma had negotiated a combined $100 million early termination
fee to leave the conference a year early, in 2024. This announcement was made 
before the schools' media rights deal with the Big 12 was set to expire in 2025.
The fact that the Big 12 made this announcement suggests that the schools had 
already accepted their invitations to join the SEC, possibly as early as when 
they negotiated the early termination fee in February 2023. Therefore, the Texas
Longhorns accepted an invitation to join the SEC in August 2023, when the Big 12
made the public announcement.