Most often in June, 28 days.
Highest follower count seen that year: 134,557.
January
Jan 1 16:00–18:00 Jan 2 07:00–09:00, 15:00–16:00 Jan 5 07:00–09:00, 15:00–17:00 Jan 6 16:00–17:00 Jan 7 07:00–08:00, 11:00–15:00 Jan 8 07:00–09:00, 15:00–16:00 Jan 9 07:00–08:00 Jan 10 07:00–08:00, 14:00–16:00 Jan 11 07:00–09:00 Jan 12 07:00–09:00, 15:00–16:00 Jan 13 07:00–09:00, 15:00–16:00 Jan 14 07:00–09:00, 14:00–16:00 Jan 16 07:00–10:00, 15:00–17:00 Jan 17 07:00–08:00, 15:00–16:00 Jan 19 07:00–09:00, 14:00–16:00 Jan 20 07:00–10:00, 15:00–16:00 Jan 21 07:00–09:00, 14:00–16:00 Jan 22 07:00–09:00, 11:00–12:00, 14:00–16:00 Jan 23 07:00–09:00, 14:00–16:00 Jan 24 07:00–09:00, 14:00–16:00 Jan 25 13:00–15:00 Jan 26 07:00–09:00, 14:00–17:00 Jan 27 07:00–08:00, 11:00–13:00, 16:00–17:00 Jan 28 06:00–08:00 Jan 29 07:00–09:00, 14:00–16:00 Jan 30 07:00–08:00, 14:00–16:00 Jan 31 14:00–16:00
February
Feb 1 14:00–16:00 Feb 2 07:00–09:00, 14:00–16:00 Feb 3 07:00–09:00, 16:00–18:00 Feb 4 07:00–09:00 Feb 5 07:00–08:00, 14:00–16:00 Feb 6 07:00–08:00 Feb 7 07:00–09:00, 14:00–16:00 Feb 8 14:00–16:00 Feb 10 07:00–09:00, 15:00–16:00 Feb 11 07:00–10:00, 14:00–15:00 Feb 12 07:00–09:00, 16:00–17:00 Feb 13 07:00–08:00 Feb 15 07:00–09:00, 16:00–18:00 Feb 16 07:00–09:00, 15:00–17:00 Feb 17 07:00–09:00, 15:00–17:00 Feb 18 07:00–08:00, 15:00–16:00 Feb 19 07:00–08:00 Feb 20 07:00–09:00, 16:00–17:00 Feb 21 07:00–09:00, 16:00–17:00 Feb 22 14:00–16:00 Feb 23 07:00–09:00, 14:00–17:00 Feb 24 07:00–09:00, 15:00–17:00 Feb 25 07:00–09:00 Feb 26 07:00–08:00, 15:00–16:00 Feb 27 07:00–09:00, 15:00–16:00 Feb 28 07:00–08:00, 17:00–18:00
March
Mar 1 07:00–09:00, 15:00–16:00 Mar 2 07:00–09:00 Mar 3 07:00–08:00, 14:00–16:00 Mar 5 07:00–09:00, 15:00–17:00 Mar 6 08:00–09:00 Mar 8 15:00–16:00 Mar 9 07:00–09:00, 15:00–16:00 Mar 10 07:00–08:00, 11:00–13:00, 18:00–20:00 Mar 11 06:00–09:00, 15:00–17:00 Mar 12 06:00–09:00, 11:00–13:00, 17:00–18:00 Mar 13 07:00–09:00, 14:00–16:00 Mar 14 06:00–09:00, 14:00–16:00 Mar 16 07:00–09:00 Mar 17 07:00–08:00, 16:00–18:00 Mar 18 06:00–08:00, 15:00–16:00 Mar 19 07:00–09:00 Mar 21 06:00–09:00, 15:00–17:00 Mar 22 16:00–18:00 Mar 23 07:00–09:00, 14:00–15:00 Mar 24 07:00–08:00, 15:00–17:00 Mar 25 15:00–17:00 Mar 26 07:00–09:00, 15:00–16:00 Mar 27 06:00–08:00, 15:00–17:00 Mar 28 12:00–13:00 Mar 29 06:00–07:00, 15:00–16:00 Mar 30 06:00–07:00, 13:00–14:00 Mar 31 02:00–04:00
April
Apr 2 14:00–15:00 Apr 3 04:00–06:00 Apr 4 14:00–15:00 Apr 5 13:00–15:00 Apr 6 13:00–15:00 Apr 7 06:00–07:00 Apr 8 07:00–09:00 Apr 9 06:00–07:00 Apr 10 06:00–08:00, 13:00–14:00 Apr 11 13:00–15:00 Apr 12 16:00–17:00 Apr 13 05:00–07:00, 10:00–11:00, 13:00–15:00 Apr 14 05:00–07:00, 13:00–15:00 Apr 15 06:00–08:00, 14:00–15:00 Apr 16 06:00–07:00, 10:00–15:00 Apr 17 06:00–08:00, 10:00–12:00 Apr 19 06:00–08:00, 14:00–16:00 Apr 20 06:00–08:00, 14:00–15:00 Apr 21 06:00–08:00, 10:00–12:00, 15:00–16:00 Apr 22 07:00–08:00, 13:00–15:00 Apr 23 06:00–08:00, 14:00–15:00 Apr 24 05:00–07:00, 13:00–15:00 Apr 25 06:00–08:00, 14:00–15:00 Apr 26 06:00–08:00, 13:00–15:00 Apr 27 06:00–08:00, 12:00–14:00 Apr 28 06:00–07:00 Apr 29 06:00–08:00, 14:00–15:00 Apr 30 06:00–08:00, 13:00–15:00
May
May 1 06:00–07:00 May 3 06:00–07:00 May 4 06:00–08:00, 13:00–14:00 May 5 06:00–08:00, 14:00–16:00 May 6 06:00–08:00, 14:00–15:00 May 7 06:00–08:00 May 8 10:00–12:00, 14:00–15:00 May 9 07:00–08:00, 14:00–16:00 May 11 06:00–08:00, 10:00–12:00, 15:00–16:00 May 12 06:00–08:00, 13:00–16:00 May 13 06:00–08:00, 10:00–11:00 May 14 06:00–08:00, 13:00–15:00 May 15 06:00–08:00, 14:00–16:00 May 16 06:00–09:00, 13:00–15:00 May 18 06:00–08:00 May 19 06:00–07:00, 13:00–15:00 May 20 06:00–07:00, 10:00–12:00, 14:00–16:00 May 21 06:00–08:00, 15:00–16:00 May 22 06:00–08:00, 14:00–16:00 May 23 06:00–07:00, 14:00–16:00 May 25 06:00–08:00, 14:00–16:00 May 26 06:00–09:00, 14:00–16:00 May 27 06:00–08:00, 14:00–16:00 May 28 06:00–09:00, 14:00–16:00 May 29 06:00–08:00, 14:00–15:00 May 30 06:00–07:00, 13:00–15:00 May 31 06:00–08:00, 14:00–16:00
June
Jun 1 06:00–08:00, 13:00–15:00 Jun 2 07:00–09:00, 14:00–15:00 Jun 3 13:00–15:00 Jun 4 06:00–08:00 Jun 5 07:00–08:00, 14:00–15:00 Jun 6 08:00–10:00, 15:00–17:00 Jun 7 14:00–16:00 Jun 8 07:00–09:00 Jun 9 06:00–08:00, 15:00–17:00 Jun 10 06:00–08:00, 13:00–15:00 Jun 11 06:00–08:00, 15:00–16:00 Jun 12 07:00–09:00 Jun 13 07:00–08:00, 13:00–15:00 Jun 15 06:00–08:00, 14:00–16:00 Jun 16 06:00–09:00, 15:00–17:00 Jun 17 06:00–07:00, 14:00–15:00 Jun 18 07:00–08:00, 14:00–15:00 Jun 19 06:00–09:00, 14:00–15:00 Jun 21 06:00–07:00 Jun 22 06:00–08:00 Jun 23 06:00–08:00, 14:00–16:00 Jun 24 06:00–07:00, 10:00–12:00, 17:00–18:00 Jun 25 05:00–08:00, 14:00–16:00 Jun 26 06:00–08:00, 13:00–16:00 Jun 27 14:00–16:00 Jun 28 06:00–08:00, 14:00–17:00 Jun 29 05:00–08:00, 14:00–16:00 Jun 30 06:00–08:00, 14:00–17:00
July
Jul 1 06:00–09:00, 14:00–16:00 Jul 2 06:00–08:00, 15:00–17:00 Jul 3 06:00–07:00, 21:00–24:00 Jul 4 00:00–01:00 Jul 5 14:00–16:00 Jul 6 06:00–08:00, 14:00–15:00 Jul 7 07:00–08:00 Jul 8 06:00–08:00, 14:00–16:00 Jul 9 06:00–08:00, 13:00–16:00 Jul 10 06:00–08:00, 14:00–16:00 Jul 12 06:00–08:00, 14:00–16:00 Jul 13 06:00–08:00, 14:00–16:00 Jul 14 06:00–09:00, 14:00–16:00 Jul 16 06:00–12:00, 15:00–17:00 Jul 17 06:00–08:00 Jul 18 07:00–08:00, 15:00–17:00 Jul 19 14:00–16:00 Jul 20 07:00–08:00, 14:00–16:00 Jul 21 06:00–07:00, 14:00–16:00 Jul 22 06:00–07:00, 16:00–19:00 Jul 23 07:00–08:00 Jul 24 14:00–15:00 Jul 25 07:00–08:00, 14:00–15:00 Jul 26 06:00–07:00, 15:00–17:00 Jul 27 06:00–08:00