Most often in July, 24 days.
Highest follower count seen that year: 4,611.
February
Feb 2 22:00–23:00 Feb 3 00:00–03:00, 21:00–24:00 Feb 4 00:00–04:00, 19:00–24:00 Feb 5 00:00–02:00, 22:00–24:00 Feb 6 00:00–07:00, 21:00–24:00 Feb 7 00:00–06:00, 08:00–12:00, 22:00–24:00 Feb 8 00:00–04:00, 06:00–09:00 Feb 10 04:00–11:00, 22:00–24:00 Feb 11 00:00–03:00, 05:00–08:00, 22:00–24:00 Feb 12 00:00–03:00, 05:00–11:00 Feb 13 04:00–14:00 Feb 14 05:00–12:00, 15:00–17:00, 23:00–24:00 Feb 15 00:00–06:00 Feb 17 04:00–05:00, 07:00–10:00 Feb 18 07:00–12:00 Feb 19 00:00–03:00, 06:00–09:00 Feb 20 08:00–11:00 Feb 21 18:00–22:00 Feb 22 02:00–12:00, 19:00–24:00 Feb 24 02:00–09:00 Feb 25 04:00–12:00 Feb 26 02:00–09:00, 20:00–24:00 Feb 27 00:00–07:00
March
Mar 2 07:00–10:00 Mar 4 06:00–08:00 Mar 5 05:00–11:00 Mar 7 00:00–04:00, 07:00–11:00, 23:00–24:00 Mar 8 00:00–01:00, 07:00–10:00 Mar 10 03:00–12:00 Mar 11 05:00–12:00 Mar 12 06:00–11:00 Mar 15 06:00–09:00, 16:00–22:00 Mar 18 07:00–14:00, 23:00–24:00 Mar 19 00:00–07:00 Mar 21 06:00–12:00 Mar 22 01:00–03:00, 07:00–08:00 Mar 25 06:00–09:00 Mar 26 05:00–07:00, 09:00–13:00, 20:00–23:00 Mar 27 06:00–09:00 Mar 28 05:00–13:00 Mar 29 00:00–06:00, 08:00–14:00 Mar 31 06:00–17:00, 20:00–22:00
April
Apr 2 06:00–13:00 Apr 5 10:00–12:00 Apr 6 06:00–08:00 Apr 7 15:00–24:00 Apr 8 05:00–07:00, 21:00–24:00 Apr 12 22:00–24:00 Apr 13 00:00–11:00 Apr 14 00:00–04:00, 08:00–14:00 Apr 15 23:00–24:00 Apr 16 00:00–03:00, 08:00–12:00 Apr 18 07:00–11:00 Apr 20 07:00–14:00 Apr 21 21:00–24:00 Apr 22 00:00–03:00, 05:00–07:00 Apr 23 20:00–23:00 Apr 24 00:00–02:00 Apr 26 18:00–23:00 Apr 27 00:00–04:00 Apr 28 06:00–11:00, 17:00–24:00 Apr 29 00:00–03:00
May
May 5 08:00–11:00 May 7 06:00–10:00 May 8 01:00–03:00, 06:00–10:00, 23:00–24:00 May 9 03:00–04:00 May 16 05:00–07:00 May 18 09:00–18:00 May 19 05:00–10:00 May 20 20:00–24:00 May 21 00:00–02:00, 23:00–24:00 May 22 00:00–04:00, 16:00–24:00 May 23 00:00–02:00, 21:00–24:00 May 24 00:00–01:00, 05:00–09:00, 18:00–23:00 May 25 20:00–24:00 May 26 00:00–04:00, 20:00–24:00 May 27 00:00–02:00, 05:00–11:00, 21:00–23:00 May 28 01:00–02:00, 04:00–07:00 May 29 06:00–07:00 May 31 00:00–11:00, 20:00–23:00
June
Jun 4 22:00–24:00 Jun 5 00:00–02:00 Jun 6 06:00–08:00 Jun 7 04:00–13:00 Jun 9 06:00–13:00 Jun 10 02:00–04:00, 07:00–13:00 Jun 12 06:00–08:00, 11:00–12:00, 22:00–24:00 Jun 13 00:00–04:00, 16:00–19:00 Jun 15 06:00–11:00 Jun 16 21:00–24:00 Jun 17 00:00–08:00 Jun 18 21:00–24:00 Jun 21 00:00–06:00, 15:00–24:00 Jun 22 00:00–07:00, 21:00–23:00 Jun 24 20:00–22:00 Jun 25 00:00–04:00, 22:00–24:00 Jun 26 00:00–02:00 Jun 28 06:00–09:00, 12:00–16:00 Jun 29 00:00–02:00
July
Jul 3 23:00–24:00 Jul 4 00:00–05:00 Jul 5 09:00–10:00, 12:00–24:00 Jul 6 00:00–03:00, 06:00–07:00 Jul 7 07:00–10:00, 22:00–24:00 Jul 8 00:00–03:00 Jul 9 21:00–24:00 Jul 10 00:00–01:00 Jul 11 23:00–24:00 Jul 12 00:00–06:00, 13:00–19:00 Jul 13 07:00–10:00 Jul 14 19:00–24:00 Jul 15 00:00–02:00, 06:00–09:00, 11:00–13:00, 20:00–24:00 Jul 17 20:00–24:00 Jul 18 00:00–01:00 Jul 19 22:00–24:00 Jul 20 02:00–06:00, 22:00–24:00 Jul 21 00:00–03:00 Jul 22 22:00–24:00 Jul 23 00:00–04:00 Jul 24 21:00–24:00 Jul 25 00:00–04:00, 08:00–11:00, 18:00–21:00 Jul 26 21:00–24:00 Jul 27 00:00–03:00, 06:00–09:00