when does the blue moon end

The next Blue Moon will not occur in 2025. The next Blue Moon after 2024 will be a calendrical Blue Moon on May 31, 2026. This means there is no Blue Moon event in August 2025 that would have an "end" date to refer to. The August full moon of 2025 is the Sturgeon Moon on August 9, and it is not a Blue Moon. The next seasonal Blue Moon after 2025 will be on May 20, 2027.