Quote from Deleted user on 08/10/2019, 6:39 PM

International Lighthouse Lightship Weekend - ILLW

3rd Full Weekend in August since 1998

00.01 UTC 15th August to 2400 UTC 16th August 2020 (48 hours)

00.01 UTC 17th August to 2400 UTC 18th August 2019 (48 hours)

Full Details:

https://illw.net/