6 instances from 3 years 2018 - 4 instances Jan Feb Mar Apr May Jun 21 4 Jun 21, 2018 4 instances 04:18:44 04:19:15 04:22:10 04:25:34 Jul Aug Sep Oct Nov Dec 2017 - 1 instance Jan 6 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2016 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 29