Most often in January, 28 days.
Highest follower count seen that year: 49,296.
January
Jan 2 16:00–21:00 Jan 3 17:00–21:00 Jan 4 17:00–21:00 Jan 5 16:00–21:00 Jan 6 17:00–21:00 Jan 7 17:00–21:00 Jan 8 17:00–21:00 Jan 9 17:00–22:00 Jan 12 17:00–21:00 Jan 13 17:00–22:00 Jan 14 17:00–21:00 Jan 15 16:00–21:00 Jan 16 16:00–21:00 Jan 17 16:00–21:00 Jan 18 18:00–21:00 Jan 19 17:00–22:00 Jan 20 17:00–21:00 Jan 21 16:00–21:00 Jan 22 16:00–21:00 Jan 23 17:00–21:00 Jan 24 16:00–22:00 Jan 25 16:00–21:00 Jan 26 16:00–21:00 Jan 27 17:00–21:00 Jan 28 17:00–21:00 Jan 29 16:00–21:00 Jan 30 16:00–21:00 Jan 31 16:00–21:00
February
Feb 1 16:00–21:00 Feb 2 15:00–21:00 Feb 3 16:00–21:00 Feb 4 15:00–20:00 Feb 5 15:00–20:00 Feb 6 16:00–21:00 Feb 7 15:00–21:00 Feb 8 15:00–21:00 Feb 9 16:00–22:00 Feb 10 17:00–21:00 Feb 11 16:00–21:00 Feb 17 17:00–22:00 Feb 18 16:00–21:00 Feb 20 15:00–22:00 Feb 21 16:00–21:00 Feb 22 16:00–21:00 Feb 23 16:00–21:00 Feb 24 16:00–21:00 Feb 25 17:00–21:00 Feb 26 16:00–21:00 Feb 27 19:00–22:00 Feb 28 15:00–21:00
March
Mar 2 16:00–21:00 Mar 3 15:00–21:00 Mar 4 15:00–21:00 Mar 5 18:00–21:00 Mar 6 17:00–21:00 Mar 9 15:00–19:00 Mar 10 16:00–21:00 Mar 11 15:00–21:00 Mar 12 16:00–21:00 Mar 13 15:00–21:00 Mar 14 16:00–21:00 Mar 15 19:00–20:00 Mar 16 16:00–17:00 Mar 20 17:00–21:00 Mar 21 15:00–21:00 Mar 22 16:00–18:00 Mar 23 16:00–22:00 Mar 24 15:00–21:00 Mar 25 15:00–21:00 Mar 26 16:00–21:00 Mar 27 16:00–20:00 Mar 28 16:00–19:00 Mar 29 14:00–20:00 Mar 30 14:00–19:00 Mar 31 15:00–19:00
April
Apr 1 15:00–19:00 Apr 2 14:00–19:00 Apr 3 15:00–18:00 Apr 4 14:00–18:00 Apr 5 15:00–18:00 Apr 7 14:00–18:00 Apr 8 15:00–19:00 Apr 9 15:00–18:00 Apr 10 15:00–18:00 Apr 11 11:00–15:00 Apr 13 14:00–19:00 Apr 14 14:00–20:00 Apr 15 14:00–20:00 Apr 16 14:00–20:00 Apr 17 15:00–20:00 Apr 18 16:00–20:00 Apr 20 15:00–17:00 Apr 21 16:00–20:00 Apr 22 15:00–20:00 Apr 23 16:00–21:00 Apr 24 15:00–20:00 Apr 25 15:00–20:00 Apr 26 15:00–20:00 Apr 27 16:00–17:00 Apr 28 19:00–20:00 Apr 29 16:00–20:00 Apr 30 15:00–20:00
May
May 1 15:00–17:00 May 2 15:00–19:00 May 3 17:00–20:00 May 4 15:00–21:00 May 5 16:00–20:00 May 6 15:00–21:00 May 7 15:00–20:00 May 8 17:00–20:00 May 9 17:00–20:00 May 10 15:00–21:00 May 11 15:00–18:00 May 12 16:00–20:00 May 13 16:00–20:00 May 14 15:00–20:00 May 15 15:00–16:00 May 18 14:00–20:00 May 19 16:00–20:00 May 23 16:00–20:00 May 24 15:00–20:00 May 25 14:00–19:00 May 26 15:00–20:00 May 27 16:00–20:00 May 28 16:00–20:00 May 29 17:00–20:00 May 30 16:00–20:00 May 31 16:00–20:00
June
Jun 1 16:00–20:00 Jun 2 15:00–21:00 Jun 3 16:00–20:00 Jun 4 16:00–21:00 Jun 5 16:00–20:00 Jun 6 16:00–20:00 Jun 7 16:00–20:00 Jun 8 16:00–20:00 Jun 9 15:00–20:00 Jun 10 15:00–20:00 Jun 11 19:00–20:00 Jun 12 16:00–19:00 Jun 13 16:00–20:00 Jun 14 16:00–20:00 Jun 15 19:00–20:00 Jun 16 16:00–20:00 Jun 17 16:00–20:00 Jun 18 15:00–20:00 Jun 19 16:00–20:00 Jun 20 16:00–20:00 Jun 21 16:00–20:00 Jun 22 15:00–20:00 Jun 23 16:00–20:00 Jun 26 17:00–20:00 Jun 27 15:00–17:00, 19:00–20:00 Jun 28 16:00–20:00 Jun 29 16:00–20:00 Jun 30 16:00–20:00
July
Jul 1 16:00–19:00 Jul 2 16:00–20:00 Jul 3 15:00–20:00 Jul 4 16:00–20:00 Jul 5 16:00–20:00 Jul 6 15:00–20:00 Jul 7 15:00–20:00 Jul 9 17:00–20:00 Jul 10 16:00–20:00 Jul 11 15:00–20:00 Jul 12 16:00–20:00 Jul 13 17:00–20:00 Jul 14 16:00–20:00 Jul 15 16:00–20:00 Jul 18 15:00–21:00 Jul 19 16:00–20:00 Jul 20 16:00–20:00 Jul 21 16:00–20:00 Jul 22 16:00–20:00 Jul 26 16:00–20:00 Jul 27 15:00–21:00 Jul 28 15:00–21:00 Jul 29 16:00–20:00 Jul 30 16:00–20:00 Jul 31 16:00–20:00
August
Aug 1 15:00–20:00 Aug 2 17:00–20:00 Aug 3 16:00–20:00 Aug 4 16:00–20:00 Aug 5 16:00–20:00 Aug 6 16:00–20:00 Aug 7 16:00–20:00 Aug 8 16:00–20:00 Aug 9 16:00–20:00 Aug 10 16:00–21:00 Aug 11 16:00–19:00 Aug 12 17:00–20:00 Aug 13 18:00–20:00 Aug 14 16:00–20:00 Aug 15 16:00–20:00 Aug 16 15:00–20:00 Aug 17 17:00–20:00 Aug 18 16:00–20:00 Aug 20 17:00–19:00 Aug 21 16:00–20:00 Aug 24 16:00–20:00 Aug 25 17:00–20:00 Aug 26 17:00–20:00 Aug 27 17:00–20:00 Aug 28 16:00–20:00 Aug 29 17:00–20:00 Aug 30 16:00–20:00 Aug 31 16:00–20:00
September
Sep 4 16:00–20:00 Sep 5 16:00–21:00 Sep 8 17:00–19:00