12 instances from 4 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:50:51 03:51:43 03:52:54 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 21:06:23 21:06:24 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 4 instances Jan Feb Mar Apr May Jun 20 4 Jun 20, 2016 4 instances 08:41:16 08:57:30 10:40:34 13:13:07 Jul Aug Sep Oct Nov Dec 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 18