20 instances from 4 years 2021 - 1 instance Jan Feb Mar 20 Apr May Jun Jul Aug Sep Oct Nov Dec 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 7 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2018 6 instances 03:17:09 03:17:09 03:17:12 03:18:47 03:18:50 19:24:14 22 Jul Aug Sep Oct Nov Dec 2017 - 11 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 02:11:37 02:12:03 02:13:24 03:56:52 03:58:59 03:59:38 Jul Aug Sep Oct 2 Nov 8 2 Nov 8, 2017 2 instances 16:17:11 16:17:14 Dec 25 2 Dec 25, 2017 2 instances 03:50:08 03:50:12