The latest daily challenge posted is for May 19, 2025, on the Bloons TD 6 subreddit, as indicated by recent activity there

. However, the specific details of the May 19 challenge are not provided in the search results. The most detailed available daily challenge information is for May 18, 2025, on the same subreddit, which involves strategies related to Bloons TD 6 gameplay

. For the exact details of the May 19 daily challenge, checking the r/btd6 subreddit directly would provide the most current information.