Most often in April, 30 days.
Highest follower count seen that year: 6,580.
January
Jan 1 13:00–15:00 Jan 2 05:00–10:00, 17:00–19:00 Jan 3 04:00–05:00, 11:00–14:00, 21:00–24:00 Jan 4 00:00–02:00, 08:00–12:00, 16:00–20:00 Jan 5 06:00–09:00, 13:00–20:00 Jan 6 06:00–08:00, 13:00–16:00 Jan 7 10:00–19:00 Jan 8 05:00–09:00, 16:00–24:00 Jan 9 08:00–09:00, 17:00–20:00 Jan 10 08:00–10:00, 12:00–13:00, 17:00–21:00 Jan 11 07:00–11:00, 16:00–20:00 Jan 12 08:00–09:00, 12:00–18:00 Jan 13 14:00–16:00, 19:00–21:00 Jan 14 05:00–08:00, 13:00–20:00 Jan 15 10:00–12:00, 17:00–21:00 Jan 16 08:00–11:00 Jan 17 06:00–08:00, 14:00–18:00 Jan 18 06:00–09:00, 13:00–18:00 Jan 20 14:00–15:00 Jan 21 07:00–09:00, 13:00–16:00 Jan 22 19:00–23:00 Jan 23 07:00–10:00, 14:00–17:00 Jan 24 06:00–09:00, 13:00–21:00 Jan 25 07:00–10:00, 19:00–20:00, 22:00–23:00 Jan 26 07:00–09:00, 13:00–20:00 Jan 27 06:00–08:00, 18:00–20:00 Jan 28 12:00–17:00, 22:00–24:00 Jan 29 00:00–05:00, 14:00–15:00, 17:00–21:00 Jan 30 10:00–11:00, 15:00–21:00 Jan 31 13:00–19:00
February
Feb 1 03:00–05:00, 13:00–15:00, 22:00–24:00 Feb 2 00:00–01:00, 09:00–17:00 Feb 3 15:00–16:00 Feb 4 08:00–09:00, 18:00–21:00 Feb 5 15:00–18:00 Feb 6 08:00–11:00, 14:00–20:00 Feb 7 08:00–11:00, 16:00–17:00 Feb 8 16:00–19:00 Feb 9 06:00–10:00, 13:00–20:00 Feb 10 07:00–09:00, 13:00–20:00 Feb 11 06:00–07:00, 15:00–20:00, 23:00–24:00 Feb 12 00:00–01:00, 08:00–10:00, 14:00–20:00 Feb 13 07:00–09:00, 17:00–22:00 Feb 14 02:00–04:00, 16:00–18:00, 21:00–24:00 Feb 15 09:00–10:00, 14:00–22:00 Feb 16 07:00–10:00, 19:00–24:00 Feb 17 00:00–02:00, 11:00–14:00, 20:00–21:00 Feb 18 02:00–04:00, 14:00–19:00 Feb 23 13:00–21:00 Feb 24 13:00–21:00 Feb 25 14:00–22:00 Feb 26 14:00–19:00 Feb 27 14:00–21:00 Feb 28 15:00–23:00
March
Mar 1 15:00–20:00 Mar 2 12:00–21:00 Mar 6 14:00–20:00 Mar 7 06:00–09:00, 15:00–21:00 Mar 8 05:00–10:00, 13:00–17:00 Mar 9 09:00–18:00 Mar 11 14:00–17:00 Mar 12 15:00–21:00 Mar 13 13:00–17:00 Mar 27 12:00–20:00 Mar 28 07:00–08:00, 14:00–22:00 Mar 29 13:00–20:00 Mar 30 16:00–20:00 Mar 31 12:00–21:00
April
Apr 1 12:00–21:00 Apr 2 12:00–20:00 Apr 3 14:00–16:00 Apr 4 06:00–08:00, 12:00–21:00 Apr 5 12:00–20:00 Apr 6 13:00–20:00 Apr 7 12:00–20:00 Apr 8 12:00–21:00 Apr 9 13:00–17:00 Apr 10 12:00–21:00 Apr 11 12:00–21:00 Apr 12 13:00–21:00 Apr 13 13:00–19:00 Apr 14 12:00–19:00 Apr 15 13:00–20:00 Apr 16 12:00–19:00 Apr 17 13:00–22:00 Apr 18 13:00–21:00 Apr 19 14:00–22:00 Apr 20 12:00–13:00, 15:00–16:00, 21:00–24:00 Apr 21 00:00–02:00, 12:00–13:00, 16:00–19:00 Apr 22 12:00–21:00 Apr 23 13:00–20:00 Apr 24 12:00–21:00 Apr 25 13:00–19:00 Apr 26 13:00–15:00, 17:00–20:00 Apr 27 13:00–21:00 Apr 28 12:00–22:00 Apr 29 07:00–08:00, 13:00–15:00, 19:00–22:00 Apr 30 11:00–21:00
May
May 1 13:00–20:00 May 2 16:00–17:00, 19:00–20:00 May 3 12:00–20:00 May 4 10:00–15:00, 18:00–20:00 May 5 14:00–16:00 May 6 09:00–14:00, 16:00–19:00 May 7 12:00–21:00 May 8 09:00–15:00, 17:00–21:00 May 11 18:00–20:00 May 12 08:00–12:00, 14:00–18:00 May 13 11:00–15:00 May 14 10:00–17:00 May 15 10:00–13:00, 15:00–21:00 May 16 08:00–09:00, 12:00–16:00, 18:00–20:00 May 17 06:00–08:00, 10:00–16:00 May 18 12:00–19:00 May 19 12:00–21:00 May 20 12:00–20:00 May 21 12:00–13:00 May 22 07:00–21:00 May 23 08:00–11:00, 13:00–16:00 May 24 09:00–10:00, 12:00–21:00 May 25 09:00–11:00, 13:00–20:00 May 26 09:00–12:00 May 27 11:00–16:00, 18:00–21:00 May 29 02:00–03:00, 17:00–20:00
June
Jun 2 14:00–21:00 Jun 4 08:00–09:00, 13:00–16:00, 19:00–22:00 Jun 5 10:00–12:00, 15:00–22:00 Jun 6 12:00–13:00, 18:00–21:00 Jun 7 13:00–22:00 Jun 8 12:00–20:00 Jun 9 11:00–13:00, 15:00–21:00 Jun 10 07:00–10:00, 12:00–21:00 Jun 11 09:00–10:00, 13:00–15:00 Jun 12 08:00–09:00, 11:00–21:00 Jun 13 10:00–17:00 Jun 15 06:00–09:00, 11:00–19:00 Jun 16 07:00–09:00, 11:00–20:00 Jun 17 09:00–13:00, 16:00–20:00 Jun 18 07:00–09:00, 11:00–15:00, 17:00–19:00 Jun 19 10:00–15:00, 17:00–20:00 Jun 20 07:00–16:00 Jun 21 07:00–11:00 Jun 24 00:00–01:00 Jun 26 07:00–08:00, 10:00–15:00 Jun 27 06:00–09:00, 11:00–12:00, 14:00–19:00 Jun 28 06:00–08:00, 10:00–14:00 Jun 29 06:00–14:00, 16:00–20:00 Jun 30 08:00–11:00, 16:00–17:00, 19:00–21:00
July
Jul 1 07:00–11:00, 18:00–22:00 Jul 2 07:00–11:00, 14:00–19:00 Jul 3 05:00–11:00, 13:00–14:00 Jul 4 04:00–13:00, 15:00–21:00 Jul 5 07:00–10:00, 15:00–16:00 Jul 6 05:00–13:00, 18:00–21:00 Jul 7 09:00–10:00 Jul 8 06:00–09:00, 13:00–14:00, 17:00–20:00 Jul 9 05:00–09:00 Jul 10 08:00–11:00, 17:00–18:00 Jul 12 16:00–18:00 Jul 14 17:00–21:00 Jul 15 12:00–13:00, 15:00–21:00 Jul 16 13:00–20:00 Jul 17 12:00–21:00 Jul 18 13:00–21:00 Jul 19 07:00–08:00, 12:00–20:00 Jul 20 13:00–15:00, 17:00–24:00 Jul 21 09:00–20:00 Jul 22 08:00–09:00, 12:00–21:00 Jul 23 13:00–18:00, 21:00–24:00 Jul 24 00:00–01:00, 13:00–14:00 Jul 25 12:00–17:00 Jul 26 18:00–19:00 Jul 27 13:00–15:00 Jul 30 17:00–19:00