The last (21st) will be on 3 August 2278. The longest two occurrences of this series (14th and 15th) will last for a total of 1 hour and 42 minutes on 18 May 2152 and 30 May 2170. Solar saros 140 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.