Radiance Preview Season Sets September 25 Kickoff at Los Angeles RQ
Riot has announced early previews, a September 25 official kickoff, and a daily gallery update for Radiance card reveals.

Preview Kickoff
Riot’s Radiance preview season officially begins on September 25 at the Los Angeles Regional Qualifier, alongside an official overview article. The announcement also identifies September 18 appearances on LCS and LEC broadcasts as previews before the main kickoff, so those broadcasts are not the start of the formal schedule.
Read the sourceReveal Schedule
Riot’s schedule assigns individual previews to creators, media outlets, and partners across dates from September 28 through October 10. Separately, the Card Gallery is set to refresh each day at 5 p.m. PT with cards revealed during the preceding day, while the #RBRadiance hashtag is listed as another way to track drops that may not appear in the published schedule.
Read the sourceCompetitive Update
The announcement also says Riot’s latest bans take effect on September 18 and advises players to update their decks before their next Nexus Night. It does not identify the affected cards in the supplied announcement.
Read the sourceQuestions, answered
When does the official Radiance preview season begin?
The formal kickoff is September 25 at the Los Angeles Regional Qualifier, with an official overview article listed for that date. Riot separately listed LCS and LEC broadcast previews on September 18.
Source for this answerHow often does the Card Gallery update?
Riot says the Card Gallery updates daily at 5 p.m. PT, displaying reveals from the previous day. That gallery timing is separate from the dates assigned to individual preview creators and outlets.
Source for this answer