Most often in January, 31 days.
Highest follower count seen that year: 3,367.
January
Jan 1 09:00–16:00 Jan 2 02:00–04:00, 09:00–17:00 Jan 3 02:00–04:00, 08:00–11:00 Jan 4 09:00–12:00, 17:00–18:00, 22:00–23:00 Jan 5 08:00–11:00, 16:00–17:00 Jan 6 08:00–13:00, 23:00–24:00 Jan 7 16:00–18:00 Jan 8 08:00–10:00, 14:00–16:00 Jan 9 04:00–05:00, 09:00–16:00 Jan 10 01:00–04:00, 09:00–10:00 Jan 11 09:00–11:00 Jan 12 02:00–03:00, 09:00–14:00 Jan 13 02:00–03:00, 08:00–11:00, 13:00–16:00 Jan 14 00:00–01:00, 09:00–12:00 Jan 15 00:00–03:00, 08:00–16:00 Jan 16 08:00–09:00 Jan 17 09:00–12:00, 19:00–21:00 Jan 18 10:00–14:00 Jan 19 09:00–11:00, 14:00–15:00 Jan 20 00:00–01:00, 09:00–11:00, 23:00–24:00 Jan 21 00:00–02:00, 09:00–11:00, 13:00–16:00 Jan 22 02:00–04:00, 08:00–11:00, 19:00–22:00 Jan 23 08:00–17:00, 23:00–24:00 Jan 24 00:00–01:00, 09:00–11:00, 20:00–23:00 Jan 25 09:00–15:00, 17:00–18:00, 23:00–24:00 Jan 26 00:00–03:00, 08:00–10:00, 13:00–14:00 Jan 27 06:00–09:00, 11:00–17:00 Jan 28 11:00–12:00, 20:00–21:00 Jan 29 06:00–07:00, 11:00–12:00, 14:00–17:00 Jan 30 06:00–07:00, 13:00–17:00 Jan 31 03:00–04:00, 11:00–17:00, 19:00–22:00
February
Feb 1 09:00–16:00, 22:00–24:00 Feb 2 00:00–01:00, 08:00–12:00, 15:00–16:00, 23:00–24:00 Feb 3 08:00–11:00, 15:00–17:00, 21:00–23:00 Feb 4 09:00–11:00, 14:00–15:00 Feb 5 01:00–03:00, 10:00–12:00, 14:00–17:00, 19:00–21:00 Feb 6 08:00–12:00, 14:00–18:00 Feb 7 00:00–01:00 Feb 8 08:00–16:00 Feb 9 09:00–14:00, 16:00–18:00, 22:00–23:00 Feb 10 05:00–06:00, 09:00–12:00, 15:00–17:00, 23:00–24:00 Feb 11 05:00–07:00, 09:00–12:00, 17:00–18:00 Feb 12 09:00–11:00, 15:00–18:00 Feb 13 07:00–14:00, 19:00–22:00 Feb 14 09:00–10:00, 19:00–20:00 Feb 15 10:00–16:00 Feb 16 07:00–10:00, 12:00–17:00, 23:00–24:00 Feb 17 00:00–01:00, 11:00–12:00, 14:00–17:00, 23:00–24:00 Feb 18 13:00–17:00, 23:00–24:00 Feb 19 16:00–17:00 Feb 20 08:00–17:00 Feb 21 18:00–20:00 Feb 22 00:00–02:00, 05:00–10:00 Feb 23 05:00–11:00, 15:00–16:00 Feb 24 05:00–08:00 Feb 25 09:00–11:00, 13:00–17:00, 23:00–24:00 Feb 26 00:00–02:00, 11:00–12:00, 14:00–19:00, 23:00–24:00 Feb 27 00:00–01:00, 15:00–17:00 Feb 28 09:00–11:00
March
Mar 1 00:00–02:00, 10:00–11:00 Mar 2 15:00–17:00, 23:00–24:00 Mar 3 09:00–10:00, 16:00–17:00 Mar 4 10:00–12:00, 15:00–18:00 Mar 5 09:00–12:00, 16:00–18:00 Mar 6 09:00–10:00, 12:00–17:00 Mar 7 14:00–16:00, 22:00–24:00 Mar 8 00:00–01:00, 10:00–12:00, 14:00–16:00 Mar 9 08:00–18:00, 22:00–24:00 Mar 10 00:00–01:00, 10:00–12:00, 15:00–18:00, 23:00–24:00 Mar 11 23:00–24:00 Mar 12 00:00–01:00, 09:00–10:00, 14:00–16:00, 22:00–24:00 Mar 13 13:00–15:00, 23:00–24:00 Mar 14 09:00–10:00, 16:00–18:00 Mar 15 09:00–10:00, 15:00–18:00 Mar 16 07:00–12:00, 14:00–16:00, 23:00–24:00 Mar 18 00:00–01:00, 08:00–13:00, 16:00–17:00 Mar 19 08:00–12:00, 15:00–17:00, 22:00–24:00 Mar 20 09:00–17:00, 20:00–24:00 Mar 21 11:00–17:00, 23:00–24:00 Mar 22 09:00–11:00 Mar 23 07:00–12:00, 14:00–16:00, 21:00–24:00 Mar 24 08:00–10:00, 14:00–15:00, 20:00–24:00 Mar 25 09:00–12:00, 14:00–16:00, 21:00–23:00 Mar 26 10:00–11:00, 21:00–23:00 Mar 27 09:00–12:00 Mar 28 09:00–13:00, 16:00–18:00, 20:00–24:00 Mar 29 11:00–12:00, 15:00–16:00, 20:00–23:00 Mar 30 09:00–12:00, 16:00–18:00, 21:00–24:00 Mar 31 10:00–12:00, 15:00–18:00
April
Apr 1 11:00–12:00, 22:00–23:00 Apr 2 10:00–13:00 Apr 3 05:00–06:00, 09:00–12:00, 15:00–17:00 Apr 4 04:00–06:00, 09:00–11:00, 16:00–17:00, 20:00–23:00 Apr 5 05:00–06:00, 11:00–12:00 Apr 6 15:00–18:00, 20:00–24:00 Apr 7 00:00–01:00, 10:00–12:00, 16:00–17:00, 22:00–24:00 Apr 8 10:00–12:00, 16:00–18:00 Apr 9 03:00–06:00, 10:00–12:00 Apr 10 04:00–05:00, 10:00–12:00 Apr 11 10:00–12:00, 16:00–17:00, 22:00–24:00 Apr 12 00:00–01:00, 04:00–06:00 Apr 13 05:00–06:00, 10:00–12:00, 16:00–18:00, 21:00–24:00 Apr 14 05:00–06:00, 20:00–24:00 Apr 15 00:00–01:00, 20:00–23:00 Apr 16 09:00–12:00, 16:00–17:00, 21:00–23:00 Apr 17 09:00–12:00, 16:00–18:00, 22:00–24:00 Apr 18 09:00–12:00, 16:00–17:00, 22:00–23:00 Apr 19 11:00–12:00, 20:00–24:00 Apr 20 00:00–01:00, 08:00–10:00, 16:00–18:00, 21:00–24:00 Apr 21 00:00–01:00, 09:00–12:00, 22:00–23:00 Apr 22 09:00–10:00, 16:00–17:00, 21:00–24:00 Apr 23 15:00–16:00, 21:00–24:00 Apr 24 09:00–12:00, 18:00–23:00 Apr 25 09:00–11:00, 16:00–18:00, 21:00–24:00 Apr 26 09:00–13:00, 16:00–17:00 Apr 27 09:00–11:00, 20:00–23:00 Apr 28 09:00–11:00, 22:00–24:00 Apr 29 09:00–12:00, 16:00–17:00, 21:00–24:00 Apr 30 10:00–14:00, 16:00–17:00, 22:00–24:00
May
May 1 05:00–06:00, 20:00–24:00 May 3 09:00–13:00 May 4 08:00–10:00, 21:00–24:00 May 5 11:00–12:00, 15:00–16:00, 23:00–24:00 May 6 05:00–07:00, 09:00–10:00, 14:00–17:00, 20:00–24:00 May 7 06:00–07:00, 16:00–19:00 May 8 05:00–07:00, 09:00–10:00, 12:00–13:00, 16:00–17:00, 21:00–24:00 May 9 08:00–12:00 May 10 08:00–10:00, 15:00–17:00 May 11 08:00–12:00 May 12 08:00–10:00, 23:00–24:00 May 13 00:00–01:00, 08:00–10:00 May 14 08:00–12:00, 21:00–24:00 May 15 21:00–23:00 May 16 09:00–12:00, 21:00–22:00 May 17 08:00–11:00, 21:00–22:00 May 18 08:00–10:00, 20:00–23:00 May 19 08:00–12:00, 21:00–23:00 May 20 15:00–16:00, 21:00–22:00 May 21 09:00–12:00, 23:00–24:00 May 22 21:00–24:00 May 23 21:00–23:00 May 24 08:00–10:00, 21:00–22:00 May 26 16:00–19:00 May 27 08:00–09:00, 11:00–13:00, 21:00–22:00 May 28 08:00–13:00, 15:00–18:00, 21:00–24:00 May 29 08:00–13:00, 15:00–17:00, 21:00–23:00 May 30 09:00–12:00, 16:00–17:00 May 31 09:00–11:00, 18:00–19:00
June
Jun 1 08:00–12:00, 15:00–16:00 Jun 2 11:00–13:00 Jun 3 11:00–12:00 Jun 4 09:00–10:00, 21:00–24:00 Jun 5 00:00–01:00, 09:00–12:00, 16:00–19:00 Jun 6 09:00–12:00, 21:00–24:00 Jun 7 00:00–01:00, 09:00–13:00, 18:00–19:00, 23:00–24:00 Jun 8 07:00–09:00 Jun 9 22:00–24:00 Jun 10 05:00–07:00, 09:00–13:00, 17:00–18:00, 21:00–23:00 Jun 11 06:00–07:00, 09:00–12:00, 17:00–18:00 Jun 12 11:00–13:00, 15:00–18:00, 23:00–24:00 Jun 13 00:00–01:00, 12:00–13:00, 17:00–19:00 Jun 15 09:00–11:00, 19:00–22:00 Jun 16 04:00–09:00, 20:00–22:00 Jun 17 05:00–06:00, 10:00–12:00, 15:00–16:00, 20:00–23:00 Jun 18 05:00–07:00, 10:00–13:00, 16:00–17:00, 19:00–22:00 Jun 19 05:00–06:00, 11:00–13:00, 15:00–16:00, 20:00–22:00 Jun 20 04:00–05:00, 11:00–13:00 Jun 21 04:00–06:00, 10:00–13:00, 21:00–24:00 Jun 22 04:00–05:00 Jun 23 09:00–13:00 Jun 24 09:00–13:00 Jun 25 10:00–11:00 Jun 26 10:00–12:00, 19:00–22:00 Jun 27 10:00–15:00 Jun 28 10:00–16:00, 19:00–23:00 Jun 29 09:00–14:00, 20:00–21:00 Jun 30 05:00–06:00, 12:00–13:00, 15:00–17:00, 20:00–24:00
July
Jul 1 00:00–02:00, 11:00–12:00, 20:00–22:00 Jul 2 09:00–12:00, 19:00–24:00 Jul 3 09:00–11:00, 20:00–22:00 Jul 5 10:00–13:00, 20:00–22:00 Jul 6 03:00–04:00, 10:00–14:00, 20:00–22:00 Jul 7 10:00–12:00, 19:00–23:00 Jul 8 10:00–13:00, 20:00–21:00 Jul 9 05:00–06:00, 21:00–23:00 Jul 10 10:00–13:00 Jul 11 09:00–13:00 Jul 12 08:00–13:00, 20:00–22:00 Jul 13 11:00–15:00, 20:00–23:00 Jul 14 10:00–13:00, 15:00–17:00, 21:00–23:00 Jul 15 22:00–24:00 Jul 16 00:00–02:00, 10:00–13:00, 20:00–23:00 Jul 17 11:00–13:00 Jul 18 20:00–23:00 Jul 19 09:00–15:00, 19:00–22:00 Jul 20 10:00–14:00, 22:00–24:00 Jul 21 00:00–01:00, 09:00–10:00, 20:00–22:00 Jul 22 11:00–12:00, 20:00–22:00 Jul 23 10:00–14:00 Jul 24 00:00–01:00, 09:00–12:00, 22:00–24:00 Jul 25 01:00–02:00 Jul 26 20:00–23:00 Jul 27 08:00–11:00