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 03:13:14 03:13:16 03:13:18 03:14:47 03:14:51 19:22:55 22 Jul Aug Sep Oct Nov Dec 2017 - 11 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 02:09:51 02:10:18 02:11:39 03:56:26 03:58:32 03:59:11 Jul Aug Sep Oct 2 Nov 8 2 Nov 8, 2017 2 instances 13:25:50 13:25:52 Dec 25 2 Dec 25, 2017 2 instances 03:46:37 03:46:41