Most often in October, 31 days.
Highest follower count seen that year: 2,911.
June
Jun 17 16:00–23:00 Jun 18 00:00–02:00, 19:00–23:00 Jun 19 00:00–02:00, 19:00–24:00 Jun 20 00:00–02:00, 19:00–24:00 Jun 21 00:00–02:00, 19:00–24:00 Jun 22 00:00–01:00 Jun 23 19:00–24:00 Jun 24 00:00–02:00, 19:00–24:00 Jun 25 00:00–02:00, 19:00–23:00 Jun 26 00:00–02:00, 19:00–24:00 Jun 27 00:00–02:00, 19:00–24:00 Jun 28 00:00–02:00, 19:00–24:00 Jun 29 00:00–02:00 Jun 30 19:00–24:00
July
Jul 1 00:00–03:00, 19:00–24:00 Jul 2 00:00–02:00, 19:00–24:00 Jul 3 00:00–01:00, 19:00–24:00 Jul 4 00:00–02:00, 19:00–24:00 Jul 5 00:00–02:00, 19:00–24:00 Jul 6 00:00–03:00 Jul 7 19:00–24:00 Jul 8 00:00–02:00, 19:00–24:00 Jul 9 00:00–02:00, 19:00–24:00 Jul 10 00:00–02:00, 19:00–24:00 Jul 11 00:00–02:00, 19:00–24:00 Jul 12 00:00–02:00, 19:00–24:00 Jul 13 00:00–02:00 Jul 14 19:00–24:00 Jul 15 00:00–03:00, 19:00–24:00 Jul 16 00:00–01:00 Jul 17 19:00–24:00 Jul 18 00:00–02:00, 19:00–24:00 Jul 19 00:00–02:00, 19:00–24:00 Jul 20 00:00–01:00, 11:00–19:00 Jul 21 19:00–24:00 Jul 22 00:00–02:00, 19:00–24:00 Jul 23 00:00–03:00 Jul 24 23:00–24:00 Jul 25 00:00–02:00, 19:00–24:00 Jul 26 00:00–02:00, 19:00–24:00 Jul 27 00:00–02:00, 12:00–19:00 Jul 28 19:00–24:00 Jul 29 00:00–02:00, 21:00–24:00 Jul 30 00:00–02:00 Jul 31 19:00–24:00
August
Aug 1 00:00–02:00, 19:00–24:00 Aug 2 00:00–02:00, 19:00–24:00 Aug 3 00:00–03:00, 11:00–19:00 Aug 4 19:00–24:00 Aug 5 00:00–01:00, 19:00–24:00 Aug 6 00:00–02:00 Aug 7 19:00–24:00 Aug 8 00:00–02:00, 19:00–24:00 Aug 9 00:00–02:00, 19:00–24:00 Aug 10 00:00–02:00 Aug 11 20:00–24:00 Aug 12 00:00–02:00, 19:00–24:00 Aug 13 00:00–01:00 Aug 14 20:00–24:00 Aug 15 00:00–02:00, 19:00–24:00 Aug 16 00:00–02:00, 11:00–24:00 Aug 17 00:00–02:00, 11:00–19:00 Aug 18 19:00–24:00 Aug 19 00:00–02:00, 19:00–24:00 Aug 20 00:00–02:00 Aug 21 19:00–24:00 Aug 22 00:00–02:00, 19:00–24:00 Aug 23 00:00–02:00, 19:00–24:00 Aug 24 00:00–02:00, 11:00–19:00 Aug 25 19:00–24:00 Aug 26 00:00–02:00, 19:00–24:00 Aug 27 00:00–02:00 Aug 28 20:00–24:00 Aug 29 00:00–02:00, 19:00–24:00 Aug 30 00:00–02:00, 19:00–24:00 Aug 31 00:00–02:00, 11:00–19:00
September
Sep 1 19:00–24:00 Sep 2 00:00–02:00, 19:00–24:00 Sep 3 00:00–02:00, 11:00–19:00 Sep 4 20:00–24:00 Sep 5 00:00–02:00, 20:00–24:00 Sep 6 00:00–02:00, 20:00–24:00 Sep 7 00:00–02:00 Sep 8 19:00–24:00 Sep 9 00:00–02:00, 19:00–21:00, 23:00–24:00 Sep 10 00:00–02:00 Sep 11 21:00–24:00 Sep 12 00:00–02:00, 19:00–24:00 Sep 13 00:00–02:00, 20:00–24:00 Sep 14 01:00–02:00, 12:00–19:00 Sep 15 19:00–24:00 Sep 16 00:00–02:00, 20:00–24:00 Sep 17 00:00–02:00 Sep 18 19:00–24:00 Sep 19 00:00–02:00, 20:00–24:00 Sep 20 00:00–02:00, 19:00–24:00 Sep 21 00:00–02:00, 11:00–19:00 Sep 22 19:00–24:00 Sep 23 00:00–02:00, 19:00–24:00 Sep 24 00:00–02:00 Sep 25 11:00–24:00 Sep 26 00:00–02:00, 19:00–24:00 Sep 27 00:00–02:00, 19:00–24:00 Sep 28 00:00–02:00, 11:00–19:00 Sep 29 19:00–24:00 Sep 30 00:00–02:00
October
Oct 1 19:00–24:00 Oct 2 00:00–02:00, 12:00–24:00 Oct 3 00:00–02:00, 19:00–24:00 Oct 4 00:00–02:00, 19:00–24:00 Oct 5 00:00–03:00 Oct 6 20:00–24:00 Oct 7 00:00–02:00, 19:00–24:00 Oct 8 00:00–02:00 Oct 9 20:00–24:00 Oct 10 00:00–02:00, 11:00–19:00 Oct 11 11:00–24:00 Oct 12 00:00–02:00 Oct 13 20:00–24:00 Oct 14 00:00–03:00, 20:00–24:00 Oct 15 00:00–03:00, 15:00–24:00 Oct 16 00:00–02:00, 19:00–24:00 Oct 17 00:00–02:00, 19:00–24:00 Oct 18 00:00–02:00, 19:00–24:00 Oct 19 00:00–02:00 Oct 20 20:00–24:00 Oct 21 00:00–02:00, 19:00–24:00 Oct 22 00:00–02:00, 20:00–24:00 Oct 23 00:00–02:00, 19:00–24:00 Oct 24 00:00–02:00, 20:00–24:00 Oct 25 00:00–02:00, 20:00–24:00 Oct 26 00:00–02:00 Oct 27 19:00–24:00 Oct 28 00:00–02:00, 19:00–24:00 Oct 29 00:00–02:00, 20:00–24:00 Oct 30 00:00–02:00, 19:00–24:00 Oct 31 00:00–02:00, 18:00–23:00
November
Nov 1 19:00–24:00 Nov 2 00:00–03:00 Nov 3 19:00–24:00 Nov 4 00:00–02:00, 19:00–24:00 Nov 5 00:00–02:00 Nov 6 19:00–24:00 Nov 7 00:00–02:00, 19:00–24:00 Nov 8 00:00–02:00, 19:00–23:00 Nov 9 00:00–02:00, 11:00–19:00 Nov 10 20:00–24:00 Nov 11 00:00–02:00, 19:00–24:00 Nov 12 00:00–02:00 Nov 13 20:00–23:00 Nov 14 00:00–02:00, 20:00–24:00 Nov 15 00:00–02:00, 19:00–24:00 Nov 16 00:00–02:00, 11:00–19:00 Nov 17 11:00–24:00 Nov 18 00:00–02:00, 19:00–24:00 Nov 19 00:00–01:00 Nov 20 11:00–24:00 Nov 21 00:00–02:00, 20:00–24:00 Nov 22 00:00–02:00, 19:00–24:00 Nov 23 01:00–03:00, 12:00–19:00 Nov 24 19:00–24:00 Nov 25 00:00–02:00, 20:00–24:00 Nov 26 00:00–02:00, 20:00–24:00 Nov 27 00:00–03:00, 20:00–24:00 Nov 28 00:00–02:00
December
Dec 1 12:00–24:00 Dec 2 00:00–02:00, 19:00–24:00 Dec 3 00:00–02:00, 19:00–24:00 Dec 4 00:00–02:00, 11:00–19:00 Dec 5 20:00–24:00 Dec 6 00:00–02:00, 20:00–24:00 Dec 7 00:00–03:00 Dec 8 19:00–24:00 Dec 9 00:00–02:00, 19:00–24:00 Dec 10 00:00–02:00, 19:00–24:00 Dec 11 00:00–02:00, 20:00–23:00 Dec 12 00:00–03:00, 19:00–24:00 Dec 13 00:00–02:00, 19:00–24:00 Dec 14 00:00–02:00 Dec 15 12:00–19:00 Dec 16 20:00–23:00 Dec 17 00:00–02:00, 19:00–24:00 Dec 18 00:00–02:00, 19:00–24:00 Dec 19 00:00–03:00, 20:00–24:00 Dec 20 00:00–02:00, 20:00–23:00 Dec 21 00:00–02:00 Dec 22 20:00–24:00 Dec 23 00:00–02:00, 21:00–24:00 Dec 24 00:00–02:00, 18:00–23:00 Dec 26 19:00–24:00 Dec 27 00:00–02:00, 19:00–24:00 Dec 28 00:00–02:00 Dec 29 20:00–24:00 Dec 30 00:00–02:00, 19:00–24:00 Dec 31 00:00–01:00, 17:00–23:00