Most often in March, 28 days.
Highest follower count seen that year: 1,429.
January
Jan 1 01:00–05:00 Jan 2 08:00–12:00 Jan 3 08:00–11:00, 13:00–19:00 Jan 4 01:00–02:00, 06:00–07:00 Jan 5 14:00–24:00 Jan 6 00:00–07:00 Jan 8 13:00–17:00, 21:00–24:00 Jan 9 01:00–02:00, 04:00–07:00 Jan 10 09:00–14:00, 18:00–20:00, 23:00–24:00 Jan 12 16:00–18:00, 20:00–21:00, 23:00–24:00 Jan 13 00:00–02:00 Jan 14 08:00–19:00 Jan 15 14:00–15:00, 17:00–22:00 Jan 16 05:00–06:00 Jan 17 09:00–12:00, 15:00–16:00, 18:00–22:00 Jan 18 05:00–06:00 Jan 19 13:00–15:00, 19:00–20:00 Jan 20 02:00–05:00 Jan 21 07:00–14:00, 17:00–18:00 Jan 22 13:00–20:00 Jan 23 04:00–05:00 Jan 24 13:00–16:00, 20:00–23:00 Jan 26 14:00–15:00, 17:00–18:00, 22:00–24:00 Jan 27 02:00–05:00 Jan 28 07:00–08:00, 10:00–19:00 Jan 29 14:00–15:00, 17:00–19:00 Jan 31 09:00–13:00, 20:00–22:00
February
Feb 1 07:00–08:00 Feb 2 16:00–20:00 Feb 3 03:00–06:00 Feb 4 10:00–13:00, 15:00–19:00 Feb 5 13:00–15:00, 18:00–20:00, 23:00–24:00 Feb 6 05:00–06:00 Feb 7 09:00–12:00, 14:00–17:00, 20:00–22:00 Feb 9 14:00–15:00, 17:00–21:00 Feb 10 03:00–06:00 Feb 11 10:00–13:00, 18:00–19:00 Feb 12 15:00–18:00, 20:00–21:00, 23:00–24:00 Feb 13 05:00–07:00 Feb 14 10:00–12:00, 18:00–22:00 Feb 16 15:00–18:00, 22:00–23:00 Feb 17 01:00–02:00, 05:00–07:00 Feb 18 14:00–15:00, 17:00–19:00 Feb 19 13:00–15:00, 18:00–19:00 Feb 20 00:00–01:00 Feb 21 08:00–11:00, 17:00–24:00 Feb 22 06:00–07:00 Feb 23 13:00–24:00 Feb 24 00:00–01:00, 06:00–07:00 Feb 25 07:00–09:00, 12:00–15:00, 18:00–19:00 Feb 26 14:00–17:00, 19:00–20:00, 22:00–24:00 Feb 27 00:00–04:00, 06:00–07:00 Feb 28 08:00–09:00, 11:00–12:00, 14:00–15:00, 17:00–24:00
March
Mar 1 07:00–08:00 Mar 2 14:00–17:00, 19:00–24:00 Mar 3 04:00–05:00 Mar 4 08:00–14:00, 19:00–20:00 Mar 5 13:00–14:00, 19:00–22:00 Mar 7 12:00–13:00, 18:00–21:00 Mar 8 08:00–12:00 Mar 9 14:00–20:00 Mar 10 05:00–06:00 Mar 11 07:00–08:00, 10:00–20:00 Mar 12 13:00–16:00, 18:00–19:00, 21:00–22:00 Mar 13 06:00–07:00 Mar 14 14:00–22:00 Mar 15 05:00–10:00 Mar 16 14:00–16:00, 18:00–24:00 Mar 17 00:00–02:00, 05:00–06:00 Mar 18 07:00–16:00, 18:00–19:00 Mar 19 13:00–14:00, 23:00–24:00 Mar 21 13:00–14:00, 23:00–24:00 Mar 22 05:00–08:00 Mar 23 13:00–14:00, 17:00–21:00 Mar 24 03:00–07:00 Mar 25 08:00–15:00, 17:00–20:00 Mar 26 13:00–15:00, 18:00–21:00 Mar 27 00:00–05:00 Mar 28 08:00–10:00, 14:00–15:00, 19:00–20:00, 23:00–24:00 Mar 29 00:00–06:00 Mar 30 13:00–15:00, 17:00–20:00
April
Apr 1 13:00–14:00, 16:00–20:00 Apr 2 04:00–06:00, 14:00–15:00 Apr 3 05:00–06:00 Apr 4 08:00–11:00, 13:00–14:00, 16:00–17:00 Apr 5 00:00–05:00 Apr 6 11:00–14:00, 16:00–21:00 Apr 7 02:00–05:00 Apr 8 12:00–14:00, 16:00–18:00 Apr 9 00:00–02:00 Apr 10 02:00–03:00 Apr 11 07:00–14:00, 16:00–19:00 Apr 13 12:00–14:00 Apr 14 04:00–05:00 Apr 15 12:00–15:00, 19:00–24:00 Apr 16 04:00–05:00, 13:00–14:00, 17:00–19:00 Apr 17 02:00–06:00 Apr 18 07:00–17:00, 19:00–22:00 Apr 19 05:00–06:00 Apr 20 12:00–14:00, 16:00–18:00, 20:00–21:00 Apr 21 05:00–06:00 Apr 22 12:00–14:00, 18:00–24:00 Apr 23 04:00–05:00, 12:00–15:00, 23:00–24:00 Apr 25 07:00–14:00, 17:00–23:00 Apr 27 21:00–22:00 Apr 28 00:00–03:00 Apr 29 12:00–14:00, 20:00–24:00 Apr 30 12:00–18:00
May
May 3 06:00–07:00 May 4 12:00–14:00, 17:00–18:00, 20:00–21:00 May 5 04:00–06:00 May 6 18:00–19:00 May 7 00:00–02:00, 20:00–21:00 May 9 08:00–10:00, 17:00–24:00 May 10 05:00–06:00 May 11 12:00–14:00, 18:00–22:00 May 12 00:00–01:00, 05:00–06:00 May 13 12:00–13:00 May 14 00:00–02:00, 13:00–14:00 May 15 02:00–04:00 May 16 14:00–17:00 May 17 21:00–23:00 May 18 12:00–13:00, 15:00–18:00 May 20 20:00–22:00 May 22 05:00–06:00 May 23 08:00–09:00, 14:00–17:00 May 24 04:00–10:00 May 25 13:00–16:00 May 26 01:00–06:00 May 27 13:00–19:00 May 28 04:00–06:00, 22:00–23:00 May 29 05:00–06:00 May 30 08:00–10:00, 13:00–14:00 May 31 01:00–04:00
June
Jun 1 13:00–14:00, 20:00–24:00 Jun 2 01:00–03:00 Jun 3 13:00–14:00, 17:00–19:00 Jun 4 22:00–23:00 Jun 6 09:00–11:00, 17:00–18:00 Jun 7 01:00–02:00 Jun 8 12:00–13:00, 21:00–24:00 Jun 9 05:00–06:00 Jun 10 13:00–14:00, 17:00–20:00 Jun 12 02:00–05:00 Jun 15 12:00–14:00, 19:00–20:00 Jun 16 04:00–06:00 Jun 17 19:00–21:00 Jun 19 02:00–05:00 Jun 20 13:00–14:00 Jun 21 00:00–06:00 Jun 23 00:00–01:00, 05:00–08:00 Jun 24 13:00–14:00, 18:00–20:00 Jun 25 21:00–23:00 Jun 27 17:00–18:00 Jun 28 04:00–08:00 Jun 29 21:00–24:00 Jun 30 00:00–01:00
July
Jul 1 13:00–14:00, 19:00–21:00 Jul 2 04:00–05:00, 21:00–24:00 Jul 3 00:00–01:00 Jul 4 09:00–10:00, 14:00–15:00, 17:00–21:00 Jul 5 06:00–07:00, 09:00–12:00 Jul 6 12:00–14:00, 20:00–24:00 Jul 7 00:00–01:00, 04:00–06:00 Jul 9 03:00–06:00 Jul 10 04:00–06:00 Jul 11 13:00–15:00, 17:00–24:00 Jul 13 12:00–15:00, 19:00–24:00 Jul 14 00:00–02:00 Jul 15 18:00–24:00 Jul 16 00:00–01:00, 22:00–23:00 Jul 17 04:00–06:00 Jul 18 13:00–15:00, 17:00–18:00, 20:00–24:00 Jul 19 00:00–02:00 Jul 20 14:00–17:00, 22:00–24:00 Jul 21 01:00–06:00 Jul 22 13:00–15:00, 20:00–24:00 Jul 23 00:00–06:00 Jul 24 01:00–04:00 Jul 25 13:00–17:00, 19:00–20:00, 22:00–24:00 Jul 26 00:00–01:00 Jul 27 13:00–14:00 Jul 30 21:00–24:00 Jul 31 03:00–04:00
August
Aug 1 13:00–15:00, 16:00–17:00, 18:00–19:00