Most often in March, 24 days.
Highest follower count seen that year: 1,390.
February
Feb 16 09:00–15:00 Feb 17 07:00–08:00, 11:00–15:00 Feb 18 10:00–11:00 Feb 20 07:00–11:00 Feb 21 07:00–12:00 Feb 23 07:00–14:00 Feb 24 06:00–12:00 Feb 25 06:00–15:00 Feb 26 07:00–15:00 Feb 27 07:00–15:00
March
Mar 3 07:00–15:00 Mar 4 07:00–09:00, 12:00–15:00 Mar 5 07:00–15:00 Mar 6 08:00–10:00 Mar 7 06:00–13:00 Mar 9 06:00–14:00 Mar 11 07:00–09:00, 11:00–14:00 Mar 13 08:00–20:00 Mar 14 01:00–04:00, 06:00–11:00, 13:00–18:00, 20:00–21:00 Mar 15 00:00–04:00, 06:00–07:00, 11:00–12:00 Mar 16 06:00–14:00 Mar 18 07:00–14:00 Mar 19 07:00–14:00 Mar 20 06:00–14:00 Mar 21 06:00–11:00 Mar 22 06:00–11:00 Mar 23 06:00–14:00 Mar 24 06:00–07:00, 11:00–13:00 Mar 25 07:00–11:00, 13:00–15:00 Mar 26 07:00–11:00, 13:00–15:00 Mar 27 07:00–14:00 Mar 28 06:00–09:00, 11:00–12:00 Mar 30 06:00–11:00 Mar 31 07:00–14:00
April
Apr 1 07:00–14:00 Apr 2 06:00–14:00 Apr 3 07:00–14:00 Apr 4 06:00–08:00, 10:00–12:00 Apr 6 06:00–14:00 Apr 8 06:00–12:00 Apr 9 07:00–14:00 Apr 10 06:00–14:00 Apr 11 06:00–12:00 Apr 13 06:00–19:00, 22:00–24:00 Apr 14 00:00–01:00, 05:00–12:00 Apr 15 16:00–19:00 Apr 16 03:00–04:00, 06:00–13:00 Apr 17 12:00–13:00 Apr 20 07:00–22:00 Apr 21 03:00–12:00 Apr 22 06:00–14:00 Apr 23 07:00–14:00 Apr 24 07:00–14:00 Apr 25 06:00–12:00 Apr 27 07:00–13:00 Apr 28 07:00–08:00, 10:00–13:00 Apr 30 07:00–09:00, 12:00–21:00
May
May 1 07:00–08:00 May 2 10:00–11:00 May 4 07:00–08:00, 10:00–14:00 May 5 07:00–13:00 May 6 07:00–13:00 May 7 07:00–11:00, 13:00–14:00 May 8 06:00–15:00 May 9 07:00–12:00 May 12 08:00–14:00 May 13 06:00–12:00 May 14 06:00–14:00 May 15 06:00–11:00, 13:00–14:00, 16:00–19:00 May 16 04:00–09:00 May 22 07:00–15:00, 17:00–20:00 May 23 03:00–11:00 May 25 08:00–19:00, 21:00–23:00 May 26 03:00–04:00, 06:00–14:00 May 27 08:00–13:00, 17:00–19:00, 21:00–24:00 May 28 04:00–05:00, 07:00–13:00
June
Jun 1 06:00–14:00 Jun 9 07:00–09:00, 12:00–20:00 Jun 10 00:00–05:00, 08:00–15:00, 18:00–20:00 Jun 11 00:00–05:00, 07:00–14:00 Jun 12 10:00–11:00, 13:00–16:00, 18:00–24:00 Jun 13 00:00–03:00, 06:00–12:00, 14:00–15:00 Jun 15 01:00–14:00 Jun 23 06:00–09:00, 12:00–13:00 Jun 24 07:00–09:00, 11:00–14:00 Jun 25 07:00–15:00, 18:00–19:00 Jun 26 00:00–04:00, 07:00–14:00 Jun 27 07:00–08:00 Jun 28 06:00–08:00, 10:00–12:00 Jun 29 06:00–14:00 Jun 30 07:00–11:00, 16:00–17:00, 23:00–24:00
July
Jul 1 01:00–05:00, 07:00–14:00 Jul 3 06:00–15:00, 17:00–19:00, 23:00–24:00 Jul 6 07:00–14:00 Jul 10 06:00–13:00 Jul 11 08:00–12:00 Jul 13 07:00–09:00, 13:00–14:00 Jul 14 08:00–14:00