12 instances from 3 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 - 10 instances Jan Feb Mar Apr May Jun 21 8 Jun 21, 2018 8 instances 08:20:08 08:20:19 08:20:31 08:20:41 08:28:53 08:29:03 21:10:30 21:10:34 Jul Aug Sep 25 2 Sep 25, 2018 2 instances 13:11:01 13:11:02 Oct Nov Dec