Most often in March, 30 days.
Highest follower count seen that year: 7,968.
January
Jan 2 13:00–19:00 Jan 3 13:00–19:00 Jan 4 09:00–13:00 Jan 5 13:00–19:00 Jan 6 13:00–19:00 Jan 7 13:00–19:00 Jan 8 13:00–19:00 Jan 10 14:00–20:00 Jan 11 08:00–09:00, 11:00–13:00 Jan 12 08:00–09:00, 12:00–13:00 Jan 13 07:00–13:00 Jan 14 13:00–19:00 Jan 15 13:00–19:00 Jan 16 14:00–19:00 Jan 17 13:00–19:00 Jan 18 07:00–13:00 Jan 19 14:00–20:00 Jan 20 13:00–18:00 Jan 21 14:00–19:00 Jan 22 13:00–19:00 Jan 23 08:00–11:00 Jan 26 13:00–19:00 Jan 27 13:00–19:00 Jan 28 07:00–08:00, 10:00–13:00 Jan 29 09:00–14:00 Jan 30 13:00–20:00 Jan 31 14:00–20:00
February
Feb 1 08:00–14:00 Feb 2 13:00–19:00 Feb 3 13:00–17:00 Feb 4 13:00–19:00 Feb 5 10:00–13:00 Feb 6 13:00–20:00 Feb 7 14:00–19:00 Feb 8 08:00–13:00 Feb 9 07:00–13:00 Feb 10 13:00–19:00 Feb 11 13:00–19:00 Feb 12 13:00–20:00 Feb 13 13:00–19:00 Feb 14 07:00–08:00, 11:00–13:00 Feb 15 08:00–12:00 Feb 16 13:00–20:00 Feb 17 13:00–19:00 Feb 18 13:00–19:00 Feb 19 13:00–18:00 Feb 20 13:00–20:00 Feb 21 08:00–13:00 Feb 22 07:00–13:00 Feb 23 07:00–13:00 Feb 24 13:00–19:00 Feb 25 13:00–19:00 Feb 26 13:00–19:00 Feb 27 13:00–20:00 Feb 28 07:00–14:00
March
Mar 1 09:00–10:00 Mar 2 08:00–13:00 Mar 3 13:00–16:00 Mar 4 13:00–20:00 Mar 5 07:00–13:00, 20:00–21:00 Mar 6 13:00–22:00 Mar 7 07:00–13:00, 19:00–24:00 Mar 8 07:00–13:00, 21:00–22:00 Mar 9 12:00–19:00, 21:00–23:00 Mar 10 13:00–23:00 Mar 11 07:00–13:00, 20:00–23:00 Mar 12 13:00–23:00 Mar 13 13:00–19:00, 22:00–23:00 Mar 14 07:00–08:00, 10:00–13:00 Mar 15 08:00–12:00 Mar 17 14:00–16:00, 18:00–20:00 Mar 18 12:00–19:00, 22:00–23:00 Mar 19 13:00–19:00, 23:00–24:00 Mar 20 13:00–19:00, 22:00–23:00 Mar 21 00:00–01:00, 08:00–13:00, 17:00–18:00, 21:00–23:00 Mar 22 07:00–08:00, 11:00–13:00, 17:00–18:00, 21:00–24:00 Mar 23 14:00–18:00, 21:00–22:00 Mar 24 13:00–19:00, 22:00–23:00 Mar 25 08:00–13:00 Mar 26 07:00–09:00, 11:00–12:00 Mar 27 13:00–20:00 Mar 28 08:00–12:00 Mar 29 07:00–12:00, 21:00–22:00 Mar 30 07:00–12:00, 21:00–22:00 Mar 31 12:00–19:00
April
Apr 1 12:00–18:00 Apr 2 12:00–18:00, 21:00–22:00 Apr 3 12:00–16:00 Apr 4 06:00–12:00 Apr 5 07:00–12:00, 20:00–22:00 Apr 6 07:00–12:00 Apr 7 12:00–18:00, 22:00–23:00 Apr 8 12:00–18:00 Apr 9 07:00–11:00 Apr 10 06:00–12:00, 21:00–22:00 Apr 11 07:00–12:00 Apr 14 06:00–12:00, 21:00–22:00 Apr 15 12:00–13:00, 16:00–19:00 Apr 16 06:00–12:00, 18:00–20:00 Apr 17 07:00–08:00, 10:00–11:00, 20:00–22:00 Apr 18 07:00–12:00, 21:00–23:00 Apr 19 06:00–12:00 Apr 20 07:00–12:00, 22:00–23:00 Apr 21 11:00–19:00 Apr 22 12:00–15:00, 17:00–18:00, 20:00–21:00 Apr 23 10:00–19:00, 21:00–24:00 Apr 24 11:00–19:00 Apr 25 13:00–19:00 Apr 26 07:00–12:00 Apr 27 09:00–12:00 Apr 28 12:00–19:00, 21:00–23:00 Apr 29 11:00–19:00 Apr 30 07:00–12:00
May
May 1 12:00–19:00 May 3 08:00–14:00 May 4 07:00–13:00 May 5 13:00–19:00 May 6 10:00–13:00, 18:00–19:00 May 7 06:00–11:00 May 8 13:00–15:00, 17:00–19:00 May 9 07:00–11:00 May 10 06:00–12:00 May 11 06:00–12:00 May 12 07:00–12:00 May 13 06:00–12:00 May 14 07:00–12:00 May 15 06:00–13:00 May 16 07:00–11:00 May 17 06:00–12:00 May 18 06:00–12:00 May 19 06:00–07:00 May 21 12:00–13:00, 16:00–19:00 May 22 06:00–12:00 May 23 07:00–12:00 May 24 06:00–12:00 May 25 05:00–11:00 May 26 05:00–11:00 May 27 05:00–11:00 May 28 05:00–11:00 May 29 05:00–11:00 May 30 13:00–18:00 May 31 12:00–18:00
June
Jun 1 05:00–11:00 Jun 2 06:00–11:00 Jun 3 05:00–11:00 Jun 4 06:00–11:00 Jun 5 07:00–12:00 Jun 6 12:00–14:00, 17:00–18:00 Jun 7 14:00–16:00, 18:00–19:00 Jun 8 06:00–11:00 Jun 9 06:00–09:00, 11:00–12:00 Jun 10 06:00–12:00 Jun 11 06:00–12:00 Jun 12 05:00–13:00 Jun 13 07:00–13:00 Jun 15 06:00–12:00 Jun 16 05:00–12:00 Jun 17 05:00–12:00 Jun 18 05:00–11:00 Jun 20 12:00–14:00, 16:00–18:00 Jun 21 06:00–12:00 Jun 22 06:00–08:00, 10:00–12:00 Jun 23 06:00–12:00 Jun 24 06:00–12:00 Jun 25 06:00–12:00 Jun 26 06:00–12:00 Jun 27 06:00–07:00, 11:00–12:00 Jun 28 06:00–08:00, 10:00–12:00 Jun 29 06:00–12:00 Jun 30 07:00–11:00
July
Jul 1 07:00–12:00 Jul 2 13:00–18:00 Jul 3 11:00–18:00 Jul 4 11:00–18:00, 20:00–23:00 Jul 5 01:00–02:00, 15:00–23:00 Jul 6 06:00–07:00, 10:00–12:00, 21:00–24:00 Jul 7 17:00–18:00 Jul 8 14:00–19:00, 21:00–22:00 Jul 9 13:00–16:00, 22:00–23:00 Jul 10 00:00–01:00, 12:00–19:00 Jul 11 07:00–13:00 Jul 12 06:00–12:00, 20:00–23:00 Jul 13 11:00–18:00, 22:00–23:00 Jul 14 07:00–13:00, 17:00–21:00 Jul 15 12:00–13:00, 22:00–24:00 Jul 16 07:00–08:00, 12:00–15:00, 21:00–24:00 Jul 17 06:00–14:00, 19:00–24:00 Jul 18 09:00–13:00, 21:00–23:00 Jul 19 07:00–12:00, 21:00–23:00 Jul 20 08:00–13:00 Jul 21 11:00–15:00, 17:00–19:00 Jul 22 11:00–12:00 Jul 24 07:00–08:00, 10:00–12:00 Jul 25 11:00–12:00 Jul 27 07:00–09:00, 10:00–11:00 Jul 30 17:00–18:00