Most often in February, 28 days.
Highest follower count seen that year: 440.
January
Jan 2 12:00–13:00 Jan 3 19:00–22:00 Jan 8 20:00–21:00 Jan 9 04:00–07:00 Jan 10 03:00–06:00, 19:00–21:00 Jan 11 05:00–07:00 Jan 12 05:00–06:00 Jan 13 03:00–04:00 Jan 14 04:00–05:00, 18:00–21:00 Jan 15 19:00–22:00 Jan 17 21:00–24:00 Jan 18 09:00–19:00 Jan 20 04:00–05:00 Jan 21 04:00–06:00, 18:00–23:00 Jan 22 13:00–14:00, 19:00–21:00 Jan 23 06:00–07:00, 19:00–20:00 Jan 24 06:00–09:00 Jan 25 02:00–04:00, 07:00–12:00, 17:00–20:00 Jan 26 18:00–22:00 Jan 27 12:00–13:00, 19:00–23:00 Jan 28 10:00–12:00, 18:00–21:00 Jan 29 20:00–23:00 Jan 30 13:00–14:00, 22:00–24:00 Jan 31 08:00–09:00, 19:00–21:00
February
Feb 1 14:00–15:00, 18:00–21:00 Feb 2 11:00–14:00 Feb 3 05:00–06:00, 11:00–13:00, 17:00–20:00 Feb 4 12:00–13:00 Feb 5 15:00–17:00 Feb 6 04:00–10:00, 18:00–22:00 Feb 7 04:00–05:00, 11:00–15:00, 18:00–19:00 Feb 8 04:00–09:00, 17:00–18:00 Feb 9 02:00–09:00, 15:00–16:00, 18:00–19:00, 22:00–23:00 Feb 10 05:00–06:00, 12:00–14:00, 19:00–22:00 Feb 11 06:00–07:00, 10:00–16:00, 20:00–24:00 Feb 12 05:00–06:00, 12:00–16:00, 18:00–22:00 Feb 13 07:00–10:00, 14:00–17:00, 19:00–23:00 Feb 14 05:00–06:00, 08:00–10:00, 19:00–21:00 Feb 15 07:00–18:00, 20:00–21:00 Feb 16 05:00–13:00, 19:00–20:00 Feb 17 04:00–05:00, 08:00–09:00, 18:00–20:00 Feb 18 13:00–14:00, 19:00–21:00 Feb 19 05:00–10:00, 20:00–23:00 Feb 20 03:00–05:00, 10:00–13:00, 20:00–23:00 Feb 21 05:00–13:00, 18:00–22:00 Feb 22 04:00–12:00 Feb 23 15:00–17:00 Feb 24 04:00–15:00, 17:00–23:00 Feb 25 15:00–16:00, 19:00–20:00 Feb 26 05:00–08:00, 16:00–17:00, 20:00–21:00 Feb 27 04:00–13:00, 15:00–16:00, 18:00–24:00 Feb 28 07:00–09:00, 11:00–16:00
March
Mar 1 10:00–14:00, 16:00–24:00 Mar 3 03:00–04:00, 15:00–17:00, 21:00–22:00 Mar 4 04:00–06:00, 08:00–10:00, 17:00–21:00 Mar 5 11:00–22:00 Mar 6 08:00–10:00, 18:00–21:00 Mar 7 07:00–10:00, 12:00–14:00, 20:00–24:00 Mar 8 00:00–01:00, 09:00–12:00, 15:00–16:00, 18:00–20:00 Mar 9 07:00–15:00, 18:00–19:00 Mar 10 04:00–05:00, 12:00–16:00 Mar 11 08:00–10:00, 16:00–19:00 Mar 12 04:00–06:00, 15:00–20:00 Mar 13 04:00–05:00, 19:00–20:00 Mar 14 06:00–13:00, 17:00–21:00 Mar 15 08:00–11:00, 14:00–15:00, 18:00–19:00, 23:00–24:00 Mar 16 09:00–12:00, 15:00–16:00, 18:00–20:00 Mar 17 10:00–11:00, 14:00–15:00 Mar 18 04:00–06:00 Mar 19 07:00–09:00 Mar 20 07:00–10:00, 12:00–15:00 Mar 21 05:00–06:00, 23:00–24:00 Mar 22 05:00–06:00, 08:00–12:00 Mar 23 09:00–11:00 Mar 24 04:00–08:00, 13:00–16:00 Mar 25 04:00–10:00, 19:00–22:00 Mar 26 05:00–06:00, 13:00–16:00, 18:00–20:00 Mar 27 18:00–22:00 Mar 28 05:00–10:00, 14:00–19:00 Mar 29 09:00–11:00
April
Apr 1 07:00–11:00, 17:00–21:00 Apr 3 04:00–10:00 Apr 5 05:00–07:00, 10:00–12:00 Apr 6 19:00–20:00 Apr 7 06:00–12:00, 17:00–18:00 Apr 8 05:00–06:00 Apr 9 06:00–07:00 Apr 10 08:00–12:00, 14:00–15:00, 18:00–22:00 Apr 11 18:00–22:00 Apr 12 19:00–21:00 Apr 13 17:00–18:00 Apr 14 05:00–07:00, 09:00–10:00, 19:00–20:00 Apr 15 19:00–20:00 Apr 16 05:00–07:00 Apr 18 08:00–09:00 Apr 19 07:00–09:00, 17:00–19:00 Apr 20 18:00–21:00 Apr 21 07:00–08:00 Apr 22 05:00–09:00, 19:00–20:00 Apr 23 05:00–06:00, 09:00–11:00, 18:00–21:00 Apr 24 08:00–09:00, 12:00–13:00, 15:00–21:00 Apr 25 07:00–13:00, 20:00–21:00 Apr 26 08:00–09:00, 12:00–14:00, 21:00–22:00 Apr 27 12:00–13:00, 20:00–21:00 Apr 28 19:00–24:00 Apr 29 08:00–09:00, 19:00–20:00 Apr 30 04:00–05:00, 09:00–13:00
May
May 3 07:00–08:00 May 4 07:00–12:00, 17:00–20:00 May 5 05:00–06:00, 10:00–16:00, 19:00–23:00 May 6 20:00–21:00 May 7 04:00–05:00, 09:00–10:00 May 8 05:00–09:00 May 9 18:00–19:00 May 10 04:00–06:00, 08:00–11:00, 14:00–15:00, 19:00–20:00 May 11 05:00–06:00, 20:00–21:00 May 12 10:00–15:00, 19:00–20:00 May 13 03:00–06:00, 08:00–11:00, 19:00–21:00 May 14 13:00–15:00, 19:00–21:00 May 15 05:00–06:00, 10:00–11:00 May 16 08:00–09:00, 18:00–19:00 May 17 05:00–06:00, 09:00–12:00, 18:00–19:00 May 18 04:00–07:00, 18:00–20:00 May 19 05:00–08:00, 10:00–13:00, 19:00–21:00 May 20 04:00–06:00 May 21 18:00–19:00 May 22 04:00–10:00 May 26 09:00–10:00 May 27 19:00–20:00 May 28 22:00–23:00 May 29 06:00–07:00, 09:00–11:00 May 30 07:00–09:00 May 31 18:00–19:00
June
Jun 1 08:00–10:00, 18:00–21:00 Jun 2 05:00–08:00, 14:00–15:00, 21:00–23:00 Jun 3 07:00–11:00, 13:00–14:00, 20:00–22:00 Jun 4 05:00–06:00, 20:00–22:00 Jun 5 17:00–22:00 Jun 6 06:00–10:00, 20:00–22:00 Jun 7 07:00–09:00, 20:00–23:00 Jun 8 05:00–07:00 Jun 9 06:00–07:00 Jun 10 13:00–17:00, 19:00–22:00 Jun 11 13:00–16:00, 20:00–21:00 Jun 12 10:00–11:00, 20:00–21:00 Jun 13 06:00–07:00, 09:00–10:00, 12:00–15:00 Jun 15 12:00–13:00, 18:00–20:00 Jun 16 07:00–09:00, 13:00–14:00 Jun 18 04:00–07:00, 12:00–13:00, 20:00–22:00 Jun 19 03:00–06:00, 11:00–13:00, 18:00–23:00 Jun 20 04:00–06:00, 20:00–22:00 Jun 21 07:00–11:00, 17:00–19:00 Jun 22 05:00–09:00, 12:00–13:00 Jun 23 05:00–08:00, 18:00–21:00 Jun 25 07:00–09:00, 13:00–15:00 Jun 28 11:00–13:00 Jun 29 03:00–05:00 Jun 30 05:00–06:00, 20:00–23:00
July
Jul 1 07:00–11:00, 14:00–15:00, 20:00–23:00 Jul 2 05:00–09:00, 11:00–12:00, 14:00–15:00, 19:00–21:00 Jul 3 05:00–08:00, 11:00–15:00, 18:00–22:00 Jul 4 06:00–09:00, 18:00–21:00 Jul 5 05:00–11:00, 19:00–20:00 Jul 6 01:00–02:00, 05:00–09:00, 19:00–23:00 Jul 7 05:00–12:00, 19:00–22:00 Jul 8 07:00–08:00 Jul 9 05:00–11:00, 13:00–14:00 Jul 10 05:00–11:00, 20:00–24:00 Jul 11 07:00–10:00 Jul 12 11:00–13:00 Jul 13 04:00–16:00, 18:00–21:00 Jul 14 05:00–07:00, 19:00–21:00 Jul 15 20:00–21:00, 23:00–24:00 Jul 16 06:00–07:00, 12:00–16:00, 19:00–22:00 Jul 17 07:00–09:00, 12:00–14:00, 20:00–22:00 Jul 18 08:00–11:00, 20:00–21:00 Jul 19 06:00–07:00 Jul 20 22:00–23:00 Jul 21 10:00–12:00, 20:00–21:00 Jul 22 22:00–23:00 Jul 23 23:00–24:00 Jul 24 00:00–02:00, 06:00–07:00 Jul 25 20:00–21:00 Jul 26 12:00–14:00 Jul 27 08:00–10:00