Most often in December, 31 days.
Highest follower count seen that year: 2,067.
April
Apr 8 15:00–17:00 Apr 9 14:00–16:00 Apr 10 13:00–16:00 Apr 11 14:00–16:00 Apr 12 14:00–17:00 Apr 13 13:00–18:00 Apr 14 14:00–16:00 Apr 15 13:00–17:00 Apr 16 14:00–17:00 Apr 17 14:00–16:00 Apr 18 14:00–16:00 Apr 20 15:00–17:00 Apr 21 14:00–16:00 Apr 23 14:00–17:00 Apr 24 14:00–17:00 Apr 25 14:00–17:00 Apr 26 14:00–18:00 Apr 27 14:00–17:00 Apr 29 15:00–17:00 Apr 30 14:00–17:00
May
May 1 14:00–17:00 May 2 14:00–17:00 May 3 14:00–17:00 May 4 15:00–18:00 May 5 14:00–18:00 May 6 14:00–15:00 May 7 14:00–19:00 May 8 15:00–16:00 May 9 10:00–16:00 May 11 14:00–15:00 May 12 14:00–15:00 May 13 14:00–17:00 May 14 14:00–18:00 May 15 14:00–16:00 May 16 10:00–11:00, 15:00–17:00 May 17 14:00–15:00 May 18 10:00–12:00, 14:00–17:00 May 19 10:00–12:00, 14:00–17:00 May 20 17:00–19:00 May 21 11:00–12:00, 14:00–16:00 May 22 13:00–16:00 May 24 14:00–15:00 May 25 14:00–16:00 May 26 14:00–16:00 May 28 14:00–15:00 May 29 14:00–17:00 May 30 14:00–17:00 May 31 14:00–17:00
June
Jun 1 14:00–16:00 Jun 2 13:00–17:00 Jun 3 15:00–16:00 Jun 4 14:00–15:00 Jun 5 15:00–16:00 Jun 6 14:00–16:00 Jun 7 14:00–16:00 Jun 8 14:00–16:00 Jun 9 14:00–18:00 Jun 19 14:00–16:00 Jun 20 13:00–16:00 Jun 21 14:00–16:00 Jun 23 14:00–17:00 Jun 24 14:00–16:00 Jun 25 14:00–17:00 Jun 26 10:00–11:00, 14:00–16:00
July
Jul 1 16:00–17:00 Jul 2 14:00–18:00 Jul 3 14:00–16:00 Jul 4 14:00–16:00 Jul 5 14:00–16:00 Jul 6 14:00–17:00 Jul 7 14:00–17:00 Jul 8 14:00–18:00 Jul 22 14:00–15:00 Jul 23 14:00–18:00 Jul 24 14:00–18:00 Jul 25 15:00–17:00 Jul 26 14:00–18:00 Jul 27 14:00–15:00 Jul 29 14:00–15:00 Jul 30 14:00–16:00
August
Aug 1 14:00–17:00 Aug 6 15:00–17:00 Aug 7 14:00–16:00 Aug 8 15:00–17:00 Aug 9 14:00–16:00 Aug 11 14:00–16:00 Aug 12 14:00–18:00 Aug 14 15:00–16:00 Aug 15 14:00–17:00 Aug 17 14:00–16:00 Aug 18 13:00–16:00 Aug 19 14:00–17:00 Aug 20 14:00–16:00 Aug 21 14:00–17:00 Aug 22 10:00–11:00, 15:00–17:00 Aug 23 14:00–17:00 Aug 24 10:00–11:00 Aug 26 14:00–16:00 Aug 27 14:00–19:00 Aug 28 15:00–17:00 Aug 29 14:00–17:00 Aug 30 15:00–16:00 Aug 31 15:00–17:00
September
Sep 1 13:00–15:00 Sep 2 14:00–16:00 Sep 8 14:00–16:00 Sep 9 14:00–16:00 Sep 10 14:00–15:00 Sep 11 14:00–16:00 Sep 12 09:00–10:00, 15:00–16:00 Sep 13 15:00–17:00 Sep 15 15:00–16:00 Sep 16 15:00–16:00 Sep 17 14:00–17:00 Sep 19 14:00–16:00 Sep 20 14:00–16:00 Sep 21 16:00–17:00 Sep 22 09:00–11:00, 14:00–16:00 Sep 23 09:00–12:00, 14:00–15:00 Sep 24 10:00–16:00 Sep 25 10:00–11:00, 14:00–17:00 Sep 26 09:00–11:00, 15:00–16:00 Sep 27 13:00–15:00 Sep 28 10:00–11:00, 14:00–16:00
October
Oct 12 14:00–15:00, 18:00–19:00 Oct 13 10:00–11:00, 15:00–17:00, 21:00–22:00 Oct 14 10:00–11:00, 14:00–17:00 Oct 15 10:00–11:00, 15:00–17:00 Oct 16 10:00–11:00, 15:00–18:00 Oct 17 10:00–11:00, 15:00–16:00 Oct 18 10:00–11:00, 14:00–16:00 Oct 19 14:00–16:00 Oct 20 10:00–11:00, 14:00–16:00 Oct 21 15:00–18:00 Oct 22 10:00–11:00, 14:00–16:00 Oct 25 14:00–16:00 Oct 29 14:00–16:00 Oct 30 14:00–15:00 Oct 31 15:00–16:00
November
Nov 1 14:00–15:00 Nov 3 14:00–15:00, 18:00–19:00 Nov 4 12:00–13:00, 16:00–17:00 Nov 5 11:00–12:00, 16:00–18:00 Nov 6 11:00–12:00, 15:00–18:00 Nov 7 11:00–12:00, 15:00–17:00 Nov 8 11:00–12:00, 16:00–18:00 Nov 9 11:00–12:00, 16:00–19:00 Nov 10 11:00–12:00, 16:00–17:00 Nov 12 11:00–13:00, 17:00–18:00 Nov 13 15:00–17:00 Nov 14 11:00–12:00 Nov 16 12:00–13:00, 16:00–17:00 Nov 17 11:00–12:00, 16:00–17:00 Nov 18 12:00–13:00, 15:00–18:00 Nov 19 11:00–13:00 Nov 20 12:00–13:00 Nov 21 16:00–18:00 Nov 22 11:00–13:00, 15:00–17:00 Nov 23 16:00–18:00 Nov 24 11:00–13:00, 15:00–17:00 Nov 25 16:00–19:00 Nov 26 11:00–12:00, 16:00–18:00 Nov 27 11:00–12:00, 16:00–17:00 Nov 28 11:00–12:00, 16:00–18:00 Nov 29 12:00–13:00, 15:00–16:00
December
Dec 1 11:00–12:00 Dec 2 11:00–12:00, 16:00–17:00 Dec 3 12:00–13:00, 16:00–18:00 Dec 4 11:00–13:00, 15:00–18:00 Dec 5 11:00–12:00, 15:00–19:00 Dec 6 11:00–12:00 Dec 7 12:00–13:00, 17:00–19:00 Dec 8 11:00–13:00, 15:00–17:00 Dec 9 11:00–12:00, 17:00–18:00 Dec 10 11:00–12:00, 16:00–18:00 Dec 11 11:00–12:00, 16:00–18:00 Dec 12 11:00–12:00, 16:00–19:00 Dec 13 12:00–13:00, 15:00–17:00 Dec 14 11:00–12:00, 16:00–18:00 Dec 15 11:00–12:00, 15:00–17:00 Dec 16 11:00–13:00, 16:00–18:00 Dec 17 11:00–12:00, 16:00–19:00 Dec 18 11:00–12:00, 15:00–18:00 Dec 19 11:00–12:00, 14:00–19:00 Dec 20 11:00–12:00, 14:00–17:00 Dec 21 11:00–12:00, 15:00–18:00 Dec 22 11:00–12:00, 15:00–18:00 Dec 23 11:00–12:00, 16:00–18:00 Dec 24 11:00–12:00, 14:00–18:00 Dec 25 11:00–12:00, 14:00–18:00 Dec 26 11:00–12:00, 15:00–21:00, 23:00–24:00 Dec 27 11:00–12:00, 14:00–18:00 Dec 28 11:00–12:00, 15:00–18:00 Dec 29 11:00–12:00, 14:00–18:00 Dec 30 11:00–12:00, 15:00–18:00 Dec 31 11:00–12:00, 17:00–20:00