Most often in April, 27 days.
Highest follower count seen that year: 1,870.
January
Jan 1 08:00–11:00 Jan 2 07:00–09:00, 11:00–12:00, 14:00–15:00 Jan 3 03:00–07:00 Jan 4 09:00–12:00, 19:00–22:00 Jan 5 00:00–10:00, 22:00–24:00 Jan 6 00:00–02:00 Jan 7 05:00–10:00 Jan 8 05:00–07:00, 23:00–24:00 Jan 9 00:00–03:00 Jan 10 01:00–05:00 Jan 11 05:00–09:00 Jan 12 06:00–10:00 Jan 13 01:00–02:00 Jan 14 00:00–06:00, 14:00–16:00 Jan 16 03:00–05:00 Jan 17 00:00–04:00 Jan 18 18:00–23:00 Jan 19 00:00–01:00, 17:00–24:00 Jan 20 17:00–19:00, 22:00–23:00 Jan 21 17:00–20:00, 23:00–24:00 Jan 22 17:00–18:00 Jan 24 02:00–03:00, 05:00–06:00, 19:00–20:00, 22:00–24:00 Jan 26 16:00–23:00 Jan 27 16:00–23:00 Jan 28 16:00–23:00 Jan 29 16:00–23:00 Jan 31 15:00–19:00, 21:00–22:00
February
Feb 1 17:00–23:00 Feb 2 19:00–20:00 Feb 3 16:00–22:00 Feb 4 17:00–19:00, 21:00–22:00 Feb 5 12:00–13:00 Feb 7 16:00–23:00 Feb 8 18:00–23:00 Feb 9 15:00–22:00 Feb 10 16:00–22:00 Feb 11 18:00–24:00 Feb 12 00:00–02:00, 20:00–23:00 Feb 13 13:00–14:00, 16:00–19:00, 21:00–24:00 Feb 14 00:00–01:00, 19:00–22:00 Feb 15 00:00–02:00, 18:00–19:00, 21:00–22:00 Feb 16 00:00–04:00, 20:00–23:00 Feb 17 19:00–23:00 Feb 18 00:00–01:00 Feb 19 07:00–11:00, 19:00–21:00 Feb 20 01:00–02:00, 22:00–24:00 Feb 21 00:00–03:00, 20:00–22:00 Feb 22 00:00–02:00 Feb 23 03:00–10:00, 18:00–20:00 Feb 24 00:00–01:00, 14:00–17:00 Feb 25 06:00–10:00, 18:00–20:00, 23:00–24:00 Feb 26 00:00–01:00 Feb 27 04:00–05:00, 07:00–11:00 Feb 28 18:00–20:00
March
Mar 1 03:00–04:00, 12:00–13:00, 17:00–19:00, 23:00–24:00 Mar 2 00:00–04:00, 13:00–19:00 Mar 3 12:00–17:00 Mar 4 13:00–17:00 Mar 5 13:00–14:00, 17:00–18:00 Mar 6 08:00–09:00, 11:00–18:00 Mar 7 10:00–12:00, 15:00–18:00 Mar 8 09:00–18:00 Mar 9 08:00–15:00, 17:00–19:00 Mar 10 07:00–11:00, 14:00–15:00 Mar 11 08:00–09:00, 11:00–13:00, 15:00–16:00 Mar 12 08:00–17:00 Mar 13 08:00–11:00, 14:00–16:00 Mar 14 10:00–11:00, 18:00–23:00 Mar 17 17:00–22:00 Mar 18 15:00–19:00, 23:00–24:00 Mar 19 00:00–01:00, 18:00–21:00 Mar 20 09:00–16:00 Mar 21 08:00–16:00 Mar 22 06:00–16:00 Mar 23 05:00–17:00 Mar 24 06:00–13:00 Mar 25 02:00–03:00, 05:00–09:00, 16:00–22:00 Mar 26 03:00–11:00, 19:00–22:00 Mar 27 09:00–13:00, 15:00–17:00 Mar 29 21:00–22:00
April
Apr 2 13:00–20:00 Apr 3 08:00–09:00 Apr 4 04:00–13:00, 15:00–20:00 Apr 5 08:00–17:00 Apr 6 12:00–20:00 Apr 7 15:00–18:00 Apr 8 07:00–16:00 Apr 9 07:00–17:00 Apr 10 08:00–17:00 Apr 11 08:00–16:00, 18:00–19:00, 21:00–22:00 Apr 12 09:00–17:00, 19:00–20:00 Apr 13 09:00–19:00, 21:00–23:00 Apr 14 08:00–09:00, 14:00–23:00 Apr 15 09:00–12:00, 15:00–22:00 Apr 16 09:00–10:00, 12:00–13:00, 15:00–18:00 Apr 17 10:00–18:00 Apr 19 10:00–22:00 Apr 20 08:00–17:00 Apr 21 17:00–21:00 Apr 22 08:00–12:00, 16:00–17:00 Apr 23 09:00–14:00 Apr 24 09:00–13:00, 15:00–18:00 Apr 25 05:00–13:00, 16:00–20:00 Apr 26 09:00–15:00, 17:00–20:00 Apr 28 17:00–20:00 Apr 29 06:00–07:00, 16:00–17:00, 19:00–20:00 Apr 30 09:00–11:00, 17:00–21:00
May
May 3 11:00–13:00, 17:00–18:00 May 5 12:00–17:00 May 6 10:00–12:00, 16:00–17:00, 20:00–21:00 May 7 09:00–10:00, 16:00–21:00 May 8 07:00–12:00, 14:00–15:00, 17:00–19:00 May 9 09:00–17:00, 20:00–23:00 May 10 19:00–22:00 May 11 09:00–10:00, 14:00–18:00 May 12 09:00–14:00 May 13 06:00–17:00, 19:00–24:00 May 14 00:00–01:00, 08:00–15:00, 19:00–20:00, 22:00–23:00 May 15 09:00–12:00, 19:00–22:00 May 16 09:00–11:00, 13:00–22:00 May 17 11:00–12:00, 15:00–16:00, 19:00–21:00 May 18 20:00–23:00 May 19 08:00–17:00 May 20 10:00–18:00, 21:00–22:00 May 21 16:00–17:00 May 22 07:00–11:00, 13:00–22:00 May 24 12:00–21:00 May 25 16:00–17:00 May 26 10:00–11:00, 13:00–18:00 May 27 12:00–13:00, 15:00–17:00, 19:00–23:00 May 29 08:00–16:00 May 30 11:00–13:00, 19:00–24:00 May 31 13:00–14:00, 16:00–18:00
June
Jun 1 08:00–09:00, 14:00–15:00 Jun 2 08:00–11:00, 13:00–18:00 Jun 3 09:00–11:00 Jun 4 11:00–12:00, 15:00–18:00 Jun 5 08:00–10:00, 13:00–18:00 Jun 6 09:00–11:00, 20:00–24:00 Jun 7 19:00–22:00 Jun 8 12:00–18:00 Jun 9 08:00–10:00, 14:00–18:00 Jun 10 07:00–13:00, 15:00–19:00 Jun 11 03:00–12:00, 18:00–23:00 Jun 12 09:00–12:00, 16:00–18:00, 21:00–24:00 Jun 13 10:00–11:00, 14:00–18:00 Jun 15 14:00–22:00 Jun 16 07:00–14:00, 17:00–21:00 Jun 18 07:00–13:00, 19:00–22:00 Jun 19 00:00–01:00, 14:00–16:00 Jun 20 14:00–23:00 Jun 21 04:00–09:00, 18:00–19:00 Jun 22 07:00–08:00, 10:00–20:00 Jun 23 07:00–22:00 Jun 24 09:00–10:00, 12:00–15:00, 17:00–21:00 Jun 25 09:00–10:00, 12:00–23:00 Jun 26 10:00–11:00, 13:00–14:00, 19:00–22:00 Jun 28 13:00–15:00, 20:00–22:00 Jun 29 21:00–22:00 Jun 30 14:00–17:00
July
Jul 1 10:00–13:00 Jul 2 15:00–17:00 Jul 3 13:00–18:00 Jul 5 17:00–22:00 Jul 6 18:00–19:00 Jul 8 11:00–15:00, 17:00–18:00 Jul 9 13:00–17:00, 20:00–21:00 Jul 10 17:00–20:00 Jul 11 16:00–18:00 Jul 12 09:00–10:00, 14:00–17:00, 20:00–21:00 Jul 14 16:00–18:00, 20:00–21:00 Jul 15 18:00–22:00 Jul 16 16:00–17:00, 19:00–23:00 Jul 17 09:00–10:00, 18:00–20:00, 23:00–24:00 Jul 18 15:00–16:00, 19:00–22:00 Jul 19 21:00–22:00 Jul 20 22:00–23:00 Jul 21 02:00–03:00, 14:00–23:00 Jul 22 18:00–24:00 Jul 23 21:00–22:00 Jul 24 02:00–04:00, 17:00–20:00, 23:00–24:00 Jul 26 18:00–19:00, 20:00–22:00