Most often in March, 31 days.
Highest follower count seen that year: 25,978.
January
Jan 1 07:00–10:00, 18:00–21:00 Jan 2 07:00–09:00, 19:00–20:00 Jan 4 17:00–19:00 Jan 5 07:00–09:00 Jan 6 07:00–09:00 Jan 8 08:00–09:00, 20:00–22:00 Jan 9 08:00–10:00, 21:00–22:00 Jan 10 18:00–19:00 Jan 11 19:00–20:00 Jan 12 07:00–09:00, 18:00–21:00 Jan 13 07:00–10:00, 19:00–21:00 Jan 14 07:00–09:00, 18:00–21:00 Jan 15 07:00–09:00, 18:00–22:00 Jan 16 08:00–10:00, 20:00–21:00 Jan 17 08:00–10:00, 18:00–21:00 Jan 18 07:00–10:00, 18:00–20:00 Jan 19 07:00–10:00, 19:00–20:00 Jan 20 07:00–10:00, 19:00–20:00 Jan 21 07:00–10:00, 19:00–21:00 Jan 22 07:00–10:00, 19:00–21:00 Jan 23 07:00–09:00, 19:00–20:00 Jan 24 07:00–09:00, 19:00–21:00 Jan 25 07:00–09:00, 18:00–20:00 Jan 26 07:00–10:00, 19:00–21:00 Jan 27 07:00–09:00, 19:00–21:00 Jan 28 07:00–10:00, 18:00–21:00 Jan 29 07:00–09:00, 19:00–21:00 Jan 30 07:00–09:00, 18:00–20:00 Jan 31 07:00–10:00, 18:00–21:00
February
Feb 1 07:00–10:00, 19:00–20:00 Feb 2 07:00–10:00, 19:00–20:00 Feb 3 07:00–10:00 Feb 4 07:00–10:00, 18:00–20:00 Feb 5 07:00–09:00, 19:00–21:00 Feb 6 07:00–09:00, 18:00–21:00 Feb 7 08:00–10:00, 18:00–20:00 Feb 8 07:00–10:00, 19:00–21:00 Feb 9 07:00–10:00, 18:00–21:00 Feb 10 07:00–10:00, 19:00–20:00 Feb 11 07:00–10:00, 19:00–21:00 Feb 12 07:00–10:00, 19:00–21:00 Feb 13 07:00–09:00, 19:00–21:00 Feb 14 07:00–09:00, 18:00–20:00 Feb 15 07:00–10:00, 19:00–20:00 Feb 16 07:00–10:00, 18:00–20:00 Feb 17 07:00–11:00, 18:00–21:00 Feb 18 07:00–10:00, 19:00–21:00 Feb 19 07:00–10:00, 19:00–21:00 Feb 20 07:00–10:00, 18:00–21:00 Feb 21 08:00–10:00, 18:00–20:00 Feb 22 07:00–10:00, 18:00–21:00 Feb 23 07:00–10:00, 19:00–21:00 Feb 24 08:00–10:00, 18:00–20:00 Feb 25 07:00–10:00, 19:00–21:00 Feb 26 07:00–10:00, 19:00–20:00 Feb 27 07:00–09:00, 19:00–20:00 Feb 28 07:00–10:00, 18:00–20:00
March
Mar 1 08:00–10:00, 18:00–21:00 Mar 2 07:00–10:00, 19:00–21:00 Mar 3 07:00–09:00, 18:00–21:00 Mar 4 06:00–09:00 Mar 5 07:00–10:00, 19:00–21:00 Mar 6 07:00–10:00, 19:00–21:00 Mar 7 06:00–09:00, 18:00–21:00 Mar 8 07:00–10:00, 19:00–21:00 Mar 9 06:00–08:00, 18:00–21:00 Mar 10 06:00–08:00, 19:00–21:00 Mar 11 18:00–21:00 Mar 12 06:00–09:00, 18:00–21:00 Mar 13 07:00–09:00, 19:00–20:00 Mar 14 07:00–09:00, 18:00–20:00 Mar 15 06:00–09:00, 18:00–20:00 Mar 16 07:00–10:00, 18:00–21:00 Mar 17 06:00–09:00, 19:00–21:00 Mar 18 07:00–09:00, 18:00–21:00 Mar 19 06:00–10:00, 18:00–21:00 Mar 20 06:00–09:00, 19:00–21:00 Mar 21 07:00–10:00, 18:00–21:00 Mar 22 07:00–09:00, 19:00–20:00 Mar 23 07:00–10:00, 19:00–20:00 Mar 24 07:00–09:00, 18:00–21:00 Mar 25 06:00–09:00, 18:00–21:00 Mar 26 07:00–10:00, 18:00–21:00 Mar 27 06:00–10:00, 18:00–21:00 Mar 28 05:00–09:00, 19:00–20:00 Mar 29 06:00–09:00, 18:00–20:00 Mar 30 19:00–21:00 Mar 31 19:00–21:00
April
Apr 1 07:00–09:00, 19:00–20:00 Apr 2 06:00–08:00, 19:00–21:00 Apr 3 07:00–09:00 Apr 4 07:00–08:00, 19:00–21:00 Apr 5 07:00–10:00, 18:00–20:00 Apr 6 18:00–20:00 Apr 7 06:00–08:00, 17:00–20:00 Apr 8 06:00–09:00, 19:00–21:00 Apr 9 07:00–09:00, 17:00–20:00 Apr 10 06:00–09:00, 18:00–20:00 Apr 11 07:00–09:00, 18:00–19:00 Apr 12 07:00–09:00, 18:00–19:00 Apr 13 06:00–09:00, 18:00–20:00 Apr 14 07:00–09:00, 18:00–20:00 Apr 15 07:00–09:00, 17:00–19:00 Apr 16 06:00–09:00, 18:00–20:00 Apr 17 06:00–09:00, 17:00–20:00 Apr 18 06:00–09:00, 18:00–20:00 Apr 19 07:00–09:00, 18:00–20:00 Apr 20 06:00–08:00, 17:00–20:00 Apr 21 06:00–09:00, 17:00–20:00 Apr 22 06:00–09:00, 19:00–20:00 Apr 23 06:00–09:00, 18:00–20:00 Apr 24 06:00–09:00, 19:00–21:00 Apr 25 06:00–09:00, 17:00–20:00 Apr 26 06:00–09:00, 17:00–20:00 Apr 27 05:00–09:00, 19:00–20:00 Apr 28 06:00–08:00, 17:00–19:00 Apr 29 06:00–09:00 Apr 30 08:00–10:00, 18:00–20:00
May
May 1 07:00–09:00, 17:00–20:00 May 2 06:00–09:00, 19:00–20:00 May 3 07:00–09:00, 18:00–20:00 May 4 07:00–09:00, 18:00–20:00 May 5 07:00–09:00, 18:00–20:00 May 6 07:00–09:00, 18:00–20:00 May 7 06:00–08:00, 19:00–20:00 May 8 07:00–09:00, 19:00–20:00 May 9 07:00–09:00, 18:00–20:00 May 10 06:00–09:00, 18:00–20:00 May 11 06:00–08:00, 19:00–20:00 May 12 06:00–08:00, 18:00–20:00 May 13 06:00–08:00, 18:00–20:00 May 14 06:00–08:00, 18:00–19:00 May 15 06:00–08:00, 18:00–19:00 May 16 06:00–08:00, 18:00–19:00 May 17 06:00–08:00, 18:00–19:00 May 18 06:00–08:00, 18:00–20:00 May 19 05:00–08:00, 19:00–20:00 May 20 06:00–08:00, 17:00–20:00 May 21 05:00–08:00, 19:00–20:00 May 22 19:00–20:00 May 23 05:00–08:00, 19:00–21:00 May 24 07:00–09:00, 18:00–20:00 May 25 08:00–09:00, 19:00–20:00 May 26 07:00–08:00, 19:00–21:00 May 27 05:00–08:00, 19:00–21:00 May 28 06:00–08:00, 19:00–21:00 May 29 05:00–07:00, 18:00–19:00 May 30 05:00–08:00, 19:00–21:00 May 31 06:00–08:00, 17:00–20:00
June
Jun 1 06:00–08:00, 18:00–20:00 Jun 2 06:00–09:00, 18:00–20:00 Jun 3 06:00–09:00, 18:00–20:00 Jun 4 06:00–08:00, 19:00–21:00 Jun 5 06:00–09:00, 19:00–21:00 Jun 6 06:00–08:00, 19:00–20:00 Jun 7 06:00–07:00, 18:00–20:00 Jun 8 06:00–09:00, 17:00–19:00 Jun 9 06:00–09:00, 19:00–21:00 Jun 10 06:00–07:00, 18:00–20:00 Jun 11 06:00–09:00, 17:00–19:00 Jun 12 06:00–09:00, 18:00–20:00 Jun 13 06:00–08:00, 18:00–19:00 Jun 15 06:00–09:00, 19:00–20:00 Jun 16 07:00–09:00, 18:00–20:00 Jun 17 05:00–09:00, 19:00–20:00 Jun 18 07:00–09:00, 17:00–19:00 Jun 19 05:00–09:00, 20:00–21:00 Jun 20 06:00–09:00, 18:00–20:00 Jun 21 05:00–09:00, 18:00–19:00 Jun 22 05:00–07:00, 18:00–20:00 Jun 23 05:00–09:00, 18:00–20:00 Jun 24 06:00–08:00, 18:00–20:00 Jun 25 05:00–08:00, 19:00–21:00 Jun 26 06:00–08:00, 18:00–20:00 Jun 27 05:00–09:00, 18:00–20:00 Jun 28 05:00–08:00, 17:00–19:00 Jun 29 05:00–08:00, 19:00–20:00 Jun 30 06:00–08:00, 17:00–20:00
July
Jul 1 06:00–09:00, 18:00–20:00 Jul 2 05:00–09:00, 19:00–20:00 Jul 3 12:00–13:00, 19:00–21:00 Jul 4 05:00–09:00, 19:00–20:00 Jul 5 18:00–19:00 Jul 6 16:00–20:00 Jul 7 18:00–20:00 Jul 8 05:00–07:00, 18:00–20:00 Jul 9 06:00–08:00, 18:00–20:00 Jul 10 05:00–08:00, 19:00–21:00 Jul 11 05:00–08:00, 18:00–20:00 Jul 12 06:00–08:00, 18:00–20:00 Jul 13 05:00–08:00, 17:00–19:00 Jul 14 06:00–08:00, 19:00–20:00 Jul 15 06:00–07:00, 18:00–19:00 Jul 16 05:00–08:00, 19:00–20:00 Jul 17 12:00–13:00, 19:00–20:00 Jul 18 05:00–06:00, 08:00–09:00, 15:00–20:00 Jul 19 16:00–17:00, 19:00–20:00 Jul 20 16:00–21:00 Jul 22 04:00–07:00, 18:00–21:00 Jul 23 06:00–08:00, 18:00–20:00 Jul 24 05:00–08:00, 18:00–20:00 Jul 25 06:00–07:00, 19:00–20:00 Jul 26 06:00–08:00, 18:00–19:00 Jul 27 06:00–07:00