Most often in May, 31 days.
Highest follower count seen that year: 7,115.
January
Jan 1 12:00–13:00, 23:00–24:00 Jan 2 03:00–04:00, 12:00–15:00, 23:00–24:00 Jan 3 02:00–03:00, 12:00–13:00, 23:00–24:00 Jan 4 03:00–04:00, 12:00–13:00, 15:00–16:00, 23:00–24:00 Jan 5 02:00–04:00, 12:00–14:00, 23:00–24:00 Jan 6 00:00–01:00, 03:00–04:00, 11:00–13:00, 15:00–16:00, 18:00–19:00 Jan 7 01:00–02:00, 11:00–12:00 Jan 8 00:00–01:00, 03:00–04:00, 12:00–15:00, 23:00–24:00 Jan 9 11:00–13:00, 15:00–16:00, 23:00–24:00 Jan 10 03:00–04:00, 12:00–13:00, 15:00–16:00, 22:00–24:00 Jan 11 02:00–03:00, 11:00–13:00, 23:00–24:00 Jan 12 02:00–03:00, 12:00–13:00, 15:00–16:00, 23:00–24:00 Jan 13 02:00–03:00, 12:00–13:00, 15:00–16:00, 19:00–20:00 Jan 14 00:00–01:00, 13:00–14:00, 17:00–19:00 Jan 15 04:00–05:00, 12:00–16:00, 21:00–22:00 Jan 16 12:00–14:00, 16:00–17:00 Jan 17 00:00–01:00, 12:00–13:00, 15:00–16:00, 20:00–21:00, 23:00–24:00 Jan 18 02:00–03:00, 12:00–13:00, 15:00–16:00, 18:00–19:00 Jan 19 00:00–01:00, 13:00–14:00, 16:00–17:00, 23:00–24:00 Jan 20 02:00–03:00, 14:00–15:00, 18:00–19:00 Jan 21 00:00–01:00, 12:00–15:00 Jan 22 01:00–02:00, 12:00–14:00, 23:00–24:00 Jan 23 03:00–04:00, 12:00–15:00 Jan 24 03:00–04:00, 23:00–24:00 Jan 25 02:00–03:00, 11:00–15:00 Jan 26 01:00–02:00, 04:00–05:00, 12:00–13:00, 16:00–17:00, 20:00–21:00 Jan 27 13:00–14:00, 16:00–17:00, 20:00–21:00 Jan 28 00:00–01:00, 11:00–13:00, 23:00–24:00 Jan 29 02:00–04:00, 12:00–13:00, 23:00–24:00 Jan 30 02:00–03:00, 12:00–15:00, 23:00–24:00 Jan 31 02:00–03:00, 11:00–15:00, 23:00–24:00
February
Feb 1 00:00–03:00, 12:00–13:00 Feb 2 00:00–01:00, 04:00–05:00, 12:00–13:00, 16:00–17:00, 21:00–24:00 Feb 3 08:00–12:00, 16:00–17:00, 19:00–21:00, 23:00–24:00 Feb 4 11:00–12:00, 14:00–15:00, 23:00–24:00 Feb 5 02:00–03:00, 12:00–13:00, 23:00–24:00 Feb 6 01:00–02:00, 11:00–13:00, 23:00–24:00 Feb 7 02:00–03:00, 12:00–13:00, 23:00–24:00 Feb 8 00:00–03:00, 12:00–16:00, 23:00–24:00 Feb 9 02:00–04:00, 12:00–18:00 Feb 10 01:00–02:00, 12:00–16:00, 19:00–20:00, 22:00–23:00 Feb 11 01:00–02:00, 12:00–15:00, 23:00–24:00 Feb 12 02:00–03:00, 12:00–13:00, 15:00–16:00, 23:00–24:00 Feb 13 02:00–03:00, 14:00–15:00, 23:00–24:00 Feb 14 02:00–03:00, 12:00–15:00, 23:00–24:00 Feb 15 04:00–05:00, 12:00–13:00, 15:00–18:00, 23:00–24:00 Feb 16 01:00–04:00, 12:00–16:00, 19:00–20:00 Feb 17 12:00–16:00, 19:00–20:00 Feb 18 01:00–04:00, 12:00–15:00, 22:00–23:00 Feb 19 01:00–02:00, 10:00–11:00 Feb 20 02:00–03:00, 12:00–15:00, 23:00–24:00 Feb 21 04:00–05:00, 12:00–13:00, 23:00–24:00 Feb 22 03:00–04:00, 12:00–13:00, 15:00–16:00, 23:00–24:00 Feb 23 02:00–03:00, 12:00–13:00, 16:00–17:00, 20:00–21:00 Feb 24 00:00–05:00, 12:00–13:00, 15:00–16:00, 21:00–22:00 Feb 25 00:00–03:00, 12:00–15:00, 23:00–24:00 Feb 26 02:00–03:00, 11:00–13:00, 23:00–24:00 Feb 27 00:00–01:00, 12:00–13:00, 15:00–16:00, 23:00–24:00 Feb 28 03:00–04:00, 12:00–15:00
March
Mar 1 02:00–03:00, 12:00–13:00, 15:00–16:00 Mar 2 00:00–01:00, 03:00–04:00, 11:00–12:00, 19:00–20:00, 22:00–23:00 Mar 3 03:00–04:00, 11:00–12:00, 14:00–15:00, 18:00–19:00, 22:00–23:00 Mar 4 03:00–04:00, 11:00–12:00, 14:00–15:00 Mar 5 12:00–14:00 Mar 6 04:00–05:00, 12:00–13:00, 15:00–16:00, 23:00–24:00 Mar 7 00:00–01:00, 03:00–04:00, 13:00–14:00 Mar 8 00:00–01:00, 03:00–04:00, 12:00–13:00 Mar 9 00:00–01:00, 03:00–04:00, 13:00–14:00, 16:00–17:00, 20:00–21:00 Mar 10 00:00–01:00, 08:00–09:00 Mar 14 21:00–22:00 Mar 15 00:00–01:00, 13:00–17:00, 20:00–21:00, 23:00–24:00 Mar 16 12:00–13:00, 16:00–17:00, 21:00–22:00 Mar 17 01:00–02:00, 04:00–05:00, 12:00–14:00, 20:00–21:00 Mar 18 01:00–02:00, 13:00–14:00, 22:00–24:00 Mar 19 03:00–04:00, 12:00–15:00, 22:00–23:00 Mar 20 02:00–03:00, 11:00–12:00, 14:00–15:00, 23:00–24:00 Mar 21 00:00–01:00, 12:00–13:00, 22:00–23:00 Mar 22 02:00–03:00, 11:00–15:00 Mar 23 01:00–02:00, 12:00–13:00, 15:00–16:00, 20:00–21:00 Mar 24 03:00–04:00, 12:00–14:00, 17:00–18:00, 20:00–21:00, 23:00–24:00 Mar 25 01:00–03:00, 11:00–14:00, 22:00–23:00 Mar 26 02:00–03:00, 11:00–14:00, 22:00–23:00 Mar 27 01:00–03:00, 10:00–14:00, 22:00–24:00 Mar 28 02:00–03:00, 22:00–23:00 Mar 29 02:00–03:00, 11:00–12:00 Mar 30 03:00–04:00, 11:00–12:00, 15:00–16:00, 21:00–23:00 Mar 31 01:00–02:00, 18:00–19:00
April
Apr 1 01:00–02:00, 10:00–14:00, 22:00–24:00 Apr 2 01:00–02:00, 11:00–12:00, 22:00–23:00 Apr 3 02:00–03:00, 13:00–14:00, 22:00–23:00 Apr 4 01:00–02:00, 11:00–14:00, 22:00–23:00 Apr 5 11:00–14:00, 22:00–23:00 Apr 6 11:00–14:00 Apr 7 12:00–13:00, 20:00–21:00 Apr 8 02:00–03:00, 11:00–14:00, 22:00–23:00 Apr 9 02:00–03:00, 11:00–12:00, 22:00–23:00 Apr 10 00:00–01:00, 11:00–14:00, 22:00–23:00 Apr 11 01:00–02:00, 11:00–12:00, 22:00–23:00 Apr 12 01:00–02:00, 11:00–14:00, 23:00–24:00 Apr 13 02:00–03:00, 11:00–12:00, 14:00–15:00, 17:00–18:00 Apr 14 00:00–01:00, 11:00–15:00, 17:00–18:00 Apr 15 01:00–02:00, 11:00–14:00, 22:00–23:00 Apr 16 11:00–12:00, 14:00–15:00, 22:00–23:00 Apr 17 00:00–01:00, 11:00–14:00, 22:00–23:00 Apr 18 02:00–04:00, 11:00–14:00, 21:00–22:00 Apr 19 01:00–02:00 Apr 20 12:00–13:00, 15:00–16:00 Apr 21 12:00–15:00, 22:00–23:00 Apr 22 11:00–13:00, 22:00–23:00 Apr 23 02:00–03:00, 08:00–09:00, 20:00–21:00 Apr 24 01:00–02:00, 11:00–12:00, 22:00–23:00 Apr 25 01:00–02:00, 11:00–12:00, 22:00–23:00 Apr 26 11:00–15:00 Apr 27 01:00–02:00, 11:00–12:00, 15:00–16:00 Apr 28 11:00–12:00, 20:00–21:00 Apr 29 01:00–02:00, 11:00–12:00 Apr 30 11:00–12:00, 22:00–23:00
May
May 1 02:00–03:00, 11:00–14:00, 22:00–24:00 May 2 10:00–11:00, 22:00–23:00 May 3 02:00–03:00, 11:00–12:00, 14:00–15:00, 23:00–24:00 May 4 10:00–14:00, 17:00–18:00, 20:00–21:00 May 5 11:00–12:00, 17:00–18:00, 21:00–22:00 May 6 01:00–03:00, 10:00–11:00, 22:00–23:00 May 7 02:00–03:00, 11:00–12:00, 14:00–15:00, 18:00–19:00 May 8 02:00–03:00, 11:00–12:00, 18:00–19:00, 22:00–23:00 May 9 00:00–01:00, 10:00–12:00, 15:00–19:00, 21:00–22:00 May 10 01:00–02:00, 11:00–13:00, 18:00–19:00 May 11 01:00–02:00, 11:00–13:00, 15:00–16:00 May 12 10:00–12:00, 15:00–16:00, 18:00–19:00 May 13 11:00–14:00, 23:00–24:00 May 14 01:00–02:00, 11:00–14:00, 22:00–24:00 May 15 01:00–02:00, 10:00–12:00, 22:00–23:00 May 16 01:00–02:00, 11:00–14:00, 22:00–23:00 May 17 01:00–03:00, 11:00–14:00, 21:00–24:00 May 18 02:00–04:00, 11:00–12:00, 19:00–20:00 May 19 00:00–01:00, 03:00–04:00, 11:00–13:00, 15:00–16:00, 18:00–19:00, 21:00–23:00 May 20 10:00–14:00, 22:00–23:00 May 21 02:00–03:00, 11:00–12:00, 22:00–23:00 May 22 11:00–14:00, 22:00–23:00 May 23 11:00–14:00, 22:00–23:00 May 24 01:00–02:00, 11:00–12:00, 14:00–15:00, 23:00–24:00 May 25 11:00–16:00, 20:00–21:00 May 26 11:00–12:00, 14:00–15:00, 17:00–18:00, 23:00–24:00 May 27 01:00–02:00, 11:00–12:00, 22:00–23:00 May 28 09:00–12:00, 21:00–23:00 May 29 01:00–02:00, 10:00–14:00 May 30 01:00–02:00, 10:00–11:00, 13:00–14:00, 22:00–23:00 May 31 01:00–03:00, 11:00–12:00, 14:00–15:00, 22:00–24:00
June
Jun 1 03:00–04:00, 11:00–12:00, 15:00–16:00, 18:00–19:00, 21:00–22:00 Jun 2 11:00–15:00, 19:00–20:00, 22:00–23:00 Jun 3 01:00–02:00, 11:00–12:00, 22:00–24:00 Jun 4 00:00–02:00, 11:00–14:00, 22:00–23:00 Jun 5 01:00–03:00, 11:00–12:00, 22:00–23:00 Jun 6 02:00–04:00, 10:00–11:00, 13:00–14:00, 22:00–23:00 Jun 7 02:00–03:00, 11:00–12:00, 22:00–23:00 Jun 8 01:00–03:00, 10:00–11:00, 18:00–20:00, 23:00–24:00 Jun 9 10:00–14:00, 16:00–17:00, 20:00–21:00, 23:00–24:00 Jun 10 00:00–01:00, 10:00–11:00, 13:00–14:00, 22:00–23:00 Jun 11 01:00–02:00, 22:00–23:00 Jun 12 00:00–01:00, 11:00–14:00, 22:00–23:00 Jun 13 01:00–03:00 Jun 14 01:00–02:00, 11:00–12:00, 21:00–23:00 Jun 15 01:00–02:00, 10:00–11:00, 13:00–14:00 Jun 16 10:00–12:00, 14:00–15:00, 17:00–18:00 Jun 17 07:00–11:00, 20:00–21:00 Jun 18 00:00–01:00, 09:00–10:00, 13:00–14:00, 22:00–23:00 Jun 19 10:00–11:00, 13:00–14:00, 22:00–23:00 Jun 20 01:00–03:00, 10:00–13:00, 21:00–22:00 Jun 21 02:00–03:00, 11:00–12:00, 21:00–24:00 Jun 22 02:00–03:00, 11:00–12:00, 14:00–15:00, 17:00–18:00 Jun 23 01:00–02:00, 11:00–12:00, 17:00–18:00 Jun 24 10:00–11:00, 22:00–23:00 Jun 25 03:00–04:00, 11:00–14:00, 22:00–23:00 Jun 26 01:00–02:00, 11:00–12:00, 22:00–23:00 Jun 27 01:00–03:00, 10:00–12:00, 21:00–22:00 Jun 28 00:00–01:00, 11:00–12:00, 14:00–15:00, 21:00–22:00 Jun 29 03:00–04:00, 11:00–12:00, 16:00–17:00, 20:00–21:00 Jun 30 01:00–02:00, 11:00–12:00, 16:00–17:00, 21:00–22:00
July
Jul 1 01:00–02:00, 11:00–14:00, 22:00–23:00 Jul 2 01:00–02:00, 11:00–14:00, 22:00–24:00 Jul 3 01:00–03:00, 11:00–14:00, 21:00–22:00 Jul 4 00:00–01:00, 10:00–11:00, 13:00–14:00, 23:00–24:00 Jul 5 11:00–12:00, 14:00–15:00 Jul 6 00:00–01:00, 03:00–04:00, 10:00–14:00 Jul 7 10:00–14:00 Jul 8 10:00–14:00, 22:00–23:00 Jul 9 01:00–02:00, 11:00–14:00, 22:00–23:00 Jul 10 02:00–03:00, 11:00–14:00, 22:00–23:00 Jul 11 02:00–03:00, 11:00–12:00 Jul 12 11:00–14:00, 22:00–23:00 Jul 13 00:00–01:00, 11:00–12:00, 14:00–15:00, 22:00–24:00 Jul 14 02:00–03:00, 11:00–12:00, 14:00–15:00 Jul 15 02:00–03:00, 10:00–18:00, 21:00–24:00 Jul 16 02:00–03:00, 12:00–15:00, 17:00–19:00, 23:00–24:00 Jul 17 02:00–03:00, 11:00–12:00, 14:00–15:00, 17:00–18:00, 21:00–22:00