Honkai: Star Rail is set to receive its version 4.5 update, titled "To Roll the Stars in Astropolis," with maintenance scheduled to begin on Tuesday, August 25, or Wednesday, August 26, depending on your region. The downtime is expected to last approximately five hours.

Players on the west coast of North America can expect maintenance to start at 3 p.m. PDT on Tuesday, with the update launching at 8 p.m. PDT. Those on the east coast of North America will see maintenance begin at 6 p.m. EDT and the game return at 11 p.m. EDT on Tuesday.

In South America, maintenance is slated to start at 7 p.m. BRT on Tuesday, with the version 4.5 launch at 12 a.m. BRT on Wednesday. For the United Kingdom, maintenance will commence at 11 p.m. BST on Tuesday, and the update will be live by 4 a.m. BST on Wednesday. Western Europe can anticipate maintenance starting at 12 a.m. CEST on Wednesday, with the game going live at 5 a.m. CEST. Players in Japan will see maintenance begin at 7 a.m. JST on Wednesday, and the update will launch at 12 p.m. JST. Finally, those on the east coast of Australia can expect maintenance to start at 8 a.m. AEST on Wednesday, with the new version available at 1 p.m. AEST.

HoYoverse is generally consistent with these maintenance schedules, though minor early or late releases can occur. Players are advised to use any remaining in-game fuel before maintenance begins. However, the new battle pass is set to launch concurrently with the patch, so some players may wish to conserve fuel to gather new materials.

Version 4.5 introduces a summer vacation theme to the game, featuring special summer iterations of two Penacony characters: Aventurine Waveflair and Robin Sumeretto. Aventurine will join as a Quantum Nihility character, while Robin will be a Wind Remembrance character. The update will also include reruns for Hyacine and Ashveil, offering another chance for players to acquire these characters. The flagship event for this patch will be a racing mini-game, which will offer customary rewards such as Stellar Jade and various upgrade materials.