Most often in January, 29 days.
Highest follower count seen that year: 6,284.
January
Jan 1 03:00–06:00, 08:00–10:00, 19:00–21:00 Jan 2 04:00–05:00, 07:00–09:00, 13:00–14:00 Jan 3 05:00–09:00, 11:00–14:00, 21:00–22:00 Jan 4 06:00–09:00, 19:00–22:00 Jan 5 03:00–12:00 Jan 6 00:00–08:00, 12:00–13:00 Jan 7 12:00–16:00 Jan 8 02:00–04:00, 06:00–13:00 Jan 9 07:00–09:00 Jan 12 03:00–08:00 Jan 13 04:00–12:00, 19:00–22:00 Jan 14 04:00–09:00, 17:00–20:00 Jan 15 00:00–01:00, 07:00–09:00, 12:00–13:00 Jan 16 05:00–09:00, 11:00–13:00, 18:00–20:00 Jan 17 03:00–13:00, 19:00–23:00 Jan 18 07:00–12:00, 18:00–21:00 Jan 19 06:00–09:00, 11:00–14:00, 19:00–20:00 Jan 20 05:00–10:00, 13:00–15:00, 19:00–21:00 Jan 21 02:00–09:00, 19:00–22:00 Jan 22 03:00–09:00, 12:00–14:00, 18:00–21:00 Jan 23 05:00–09:00, 12:00–14:00 Jan 24 04:00–10:00, 20:00–22:00 Jan 25 05:00–09:00, 12:00–15:00, 19:00–20:00 Jan 26 03:00–09:00, 13:00–15:00, 18:00–21:00 Jan 27 03:00–09:00, 12:00–15:00, 17:00–20:00 Jan 28 01:00–09:00, 12:00–14:00, 18:00–20:00 Jan 29 05:00–09:00, 11:00–12:00, 23:00–24:00 Jan 30 00:00–01:00, 05:00–08:00 Jan 31 03:00–06:00, 08:00–09:00, 11:00–13:00
February
Feb 1 06:00–14:00 Feb 2 06:00–08:00 Feb 3 06:00–09:00 Feb 4 08:00–09:00 Feb 6 06:00–12:00 Feb 7 05:00–11:00 Feb 8 03:00–14:00, 18:00–19:00 Feb 9 02:00–08:00, 18:00–23:00 Feb 10 04:00–06:00, 11:00–16:00 Feb 11 05:00–13:00, 18:00–20:00 Feb 12 03:00–10:00, 12:00–15:00 Feb 13 05:00–09:00, 12:00–15:00 Feb 14 03:00–07:00, 12:00–13:00, 16:00–20:00 Feb 15 06:00–15:00, 19:00–21:00 Feb 16 06:00–11:00, 18:00–20:00 Feb 17 06:00–12:00, 18:00–20:00 Feb 18 05:00–08:00, 10:00–13:00 Feb 19 02:00–12:00 Feb 20 00:00–04:00, 06:00–09:00, 11:00–14:00, 18:00–20:00 Feb 22 02:00–09:00, 11:00–12:00, 17:00–20:00 Feb 23 02:00–09:00, 11:00–14:00 Feb 24 03:00–08:00, 11:00–14:00, 23:00–24:00 Feb 25 06:00–14:00, 19:00–22:00 Feb 26 03:00–09:00 Feb 27 03:00–12:00, 18:00–20:00 Feb 28 02:00–09:00, 11:00–14:00, 18:00–19:00
March
Mar 1 04:00–12:00, 18:00–19:00 Mar 2 03:00–08:00 Mar 3 06:00–09:00 Mar 6 08:00–15:00, 18:00–21:00 Mar 7 03:00–04:00, 06:00–09:00, 11:00–16:00, 18:00–20:00 Mar 8 05:00–16:00, 18:00–19:00 Mar 9 05:00–11:00, 17:00–20:00 Mar 10 05:00–09:00, 17:00–20:00 Mar 11 04:00–09:00, 18:00–20:00 Mar 12 04:00–14:00 Mar 13 07:00–10:00 Mar 14 06:00–12:00 Mar 15 02:00–13:00, 17:00–19:00 Mar 16 02:00–13:00, 17:00–20:00 Mar 17 03:00–09:00, 18:00–22:00 Mar 18 06:00–11:00, 19:00–22:00 Mar 19 04:00–09:00, 17:00–19:00 Mar 20 04:00–09:00, 17:00–21:00 Mar 21 04:00–08:00, 18:00–23:00 Mar 22 04:00–09:00, 11:00–13:00, 17:00–19:00 Mar 23 05:00–09:00, 12:00–14:00, 18:00–21:00 Mar 24 05:00–13:00, 15:00–16:00, 18:00–20:00 Mar 25 03:00–05:00, 07:00–10:00, 17:00–20:00 Mar 26 01:00–05:00 Mar 27 05:00–09:00, 12:00–15:00, 17:00–21:00 Mar 28 18:00–19:00 Mar 29 10:00–14:00
April
Apr 2 05:00–08:00, 10:00–12:00 Apr 3 04:00–08:00, 11:00–14:00 Apr 4 03:00–09:00, 11:00–13:00, 18:00–21:00 Apr 5 04:00–09:00, 11:00–13:00, 17:00–21:00 Apr 6 08:00–14:00, 17:00–20:00 Apr 7 05:00–09:00, 11:00–12:00 Apr 8 07:00–14:00, 17:00–20:00 Apr 9 02:00–09:00 Apr 10 02:00–08:00, 10:00–13:00, 18:00–19:00 Apr 11 03:00–04:00, 06:00–09:00, 11:00–13:00, 18:00–20:00 Apr 12 07:00–08:00, 10:00–15:00, 18:00–20:00 Apr 13 04:00–14:00, 19:00–21:00 Apr 14 04:00–09:00, 11:00–13:00, 16:00–20:00 Apr 15 04:00–09:00, 11:00–13:00, 15:00–20:00 Apr 16 03:00–09:00, 12:00–13:00, 18:00–20:00 Apr 17 07:00–09:00, 18:00–22:00 Apr 18 06:00–09:00, 12:00–13:00, 18:00–21:00 Apr 19 06:00–13:00, 17:00–19:00 Apr 20 06:00–13:00, 17:00–19:00 Apr 21 17:00–19:00 Apr 22 04:00–09:00, 12:00–14:00, 18:00–21:00 Apr 23 05:00–12:00, 18:00–21:00 Apr 24 04:00–12:00, 18:00–22:00 Apr 25 02:00–04:00, 06:00–09:00, 11:00–14:00 Apr 29 03:00–09:00, 11:00–14:00, 19:00–20:00 Apr 30 03:00–12:00, 18:00–20:00
May
May 1 05:00–09:00 May 2 06:00–09:00, 11:00–12:00, 19:00–20:00 May 3 07:00–14:00 May 4 06:00–12:00, 18:00–22:00 May 5 07:00–09:00, 18:00–21:00 May 6 05:00–09:00, 11:00–12:00, 18:00–22:00 May 7 05:00–13:00, 19:00–21:00 May 8 06:00–09:00, 18:00–21:00 May 9 05:00–09:00, 18:00–21:00 May 10 11:00–12:00, 17:00–20:00 May 11 10:00–13:00, 18:00–21:00 May 12 02:00–03:00, 07:00–09:00, 11:00–13:00, 18:00–21:00 May 13 04:00–08:00 May 14 03:00–14:00, 18:00–21:00 May 15 05:00–13:00, 17:00–20:00 May 16 06:00–09:00, 11:00–13:00, 18:00–20:00 May 17 05:00–14:00, 18:00–20:00 May 18 05:00–11:00 May 19 02:00–13:00, 19:00–21:00 May 20 02:00–05:00, 07:00–13:00 May 21 02:00–13:00 May 22 02:00–05:00 May 27 11:00–13:00, 18:00–21:00 May 28 03:00–09:00, 11:00–14:00 May 29 02:00–13:00, 19:00–20:00 May 30 04:00–09:00, 11:00–14:00, 18:00–20:00 May 31 03:00–13:00, 18:00–20:00
June
Jun 1 03:00–09:00, 18:00–20:00 Jun 2 02:00–09:00 Jun 3 03:00–09:00, 12:00–13:00 Jun 4 12:00–15:00, 19:00–22:00 Jun 5 03:00–04:00, 06:00–09:00, 11:00–12:00 Jun 6 11:00–14:00, 18:00–20:00 Jun 7 07:00–10:00 Jun 8 03:00–09:00, 12:00–15:00 Jun 9 02:00–09:00, 18:00–19:00 Jun 10 03:00–13:00 Jun 11 03:00–14:00 Jun 12 02:00–15:00 Jun 13 03:00–06:00 Jun 15 03:00–09:00 Jun 21 11:00–13:00 Jun 22 02:00–09:00, 12:00–14:00 Jun 23 05:00–09:00, 12:00–14:00 Jun 24 03:00–09:00, 11:00–13:00 Jun 25 02:00–10:00 Jun 27 17:00–20:00 Jun 28 13:00–14:00 Jun 29 04:00–13:00 Jun 30 04:00–09:00, 11:00–12:00
July
Jul 1 04:00–09:00, 11:00–14:00 Jul 2 02:00–12:00 Jul 3 02:00–09:00 Jul 4 02:00–05:00, 08:00–13:00 Jul 5 03:00–14:00 Jul 6 02:00–09:00 Jul 7 01:00–04:00, 06:00–09:00 Jul 8 02:00–09:00 Jul 9 02:00–13:00 Jul 10 07:00–09:00 Jul 16 03:00–09:00, 11:00–14:00 Jul 17 02:00–09:00, 11:00–13:00 Jul 21 03:00–08:00, 11:00–12:00 Jul 22 02:00–09:00, 12:00–14:00 Jul 23 04:00–09:00 Jul 24 06:00–14:00