Date A Live III Anime to Have 12 Episodes

The official website for the anime based on Koushi Tachibana's Date A Live light novel series is listing that Date A Live III, the third television anime season in the franchise, will have 12 episodes across two home video box sets.
The anime will premiere on AT-X on January 11 at 9:30 p.m., before airing later that evening on Tokyo MX and KBS Kyoto. The series will also air on TV Aichi, Sun TV, TVQ Broadcasting Kyushu, and BS11. The anime will stream in Japan on d Anime Store, AbemaTV, and other streaming services.
The anime will feature a returning cast, and Ayumi Mano is joining the cast as the "Seventh Spirit" Natsumi.
Keitaro Motonaga is returning to direct the anime at J.C. Staff (AIC PLUS+ and Production IMS produced the previous two series respectively). Hideki Shirane is returning to handle the series composition, and Koji Watanabe (key animator for first two seasons) is designing the characters. Four-member musical unit sweet ARMS will perform the opening theme song "I Swear," and Eri Yamazaki will perform the ending theme song "Last Promise."
Source: Date A Live anime's website