Most often in January, 31 days.
Highest follower count seen that year: 24,783.
January
Jan 1 09:00–16:00, 18:00–20:00 Jan 2 11:00–13:00, 19:00–21:00 Jan 3 10:00–13:00, 19:00–20:00 Jan 4 11:00–16:00, 19:00–21:00 Jan 5 09:00–12:00, 18:00–20:00 Jan 6 10:00–13:00 Jan 7 10:00–13:00, 18:00–21:00 Jan 8 09:00–14:00, 17:00–21:00 Jan 9 09:00–15:00, 19:00–20:00 Jan 10 11:00–14:00, 19:00–21:00 Jan 11 11:00–13:00, 17:00–21:00 Jan 12 10:00–13:00, 19:00–21:00 Jan 13 10:00–14:00, 19:00–20:00 Jan 14 11:00–13:00, 19:00–21:00 Jan 15 10:00–13:00, 15:00–16:00, 18:00–21:00 Jan 16 10:00–13:00, 19:00–20:00 Jan 17 11:00–14:00, 19:00–21:00 Jan 18 11:00–16:00, 18:00–21:00 Jan 19 10:00–13:00, 19:00–21:00 Jan 20 11:00–14:00, 19:00–21:00 Jan 21 10:00–14:00, 19:00–21:00 Jan 22 11:00–15:00, 17:00–21:00 Jan 23 10:00–14:00, 19:00–20:00 Jan 24 11:00–13:00, 19:00–21:00 Jan 25 10:00–15:00, 18:00–21:00 Jan 26 11:00–14:00, 19:00–21:00 Jan 27 09:00–15:00, 19:00–21:00 Jan 28 10:00–13:00, 19:00–21:00 Jan 29 11:00–16:00, 20:00–21:00 Jan 30 11:00–15:00, 20:00–21:00 Jan 31 09:00–13:00, 20:00–21:00
February
Feb 1 12:00–14:00, 18:00–21:00 Feb 2 10:00–14:00, 19:00–20:00 Feb 3 12:00–14:00, 20:00–21:00 Feb 4 11:00–13:00, 20:00–22:00 Feb 5 11:00–13:00, 19:00–21:00 Feb 6 10:00–13:00, 20:00–21:00 Feb 7 11:00–14:00, 20:00–21:00 Feb 8 10:00–16:00, 19:00–21:00 Feb 9 11:00–14:00, 19:00–21:00 Feb 10 09:00–13:00, 19:00–21:00 Feb 11 11:00–14:00, 19:00–21:00 Feb 12 11:00–13:00, 18:00–21:00 Feb 13 11:00–15:00, 19:00–21:00 Feb 14 11:00–14:00, 19:00–21:00 Feb 15 11:00–16:00, 19:00–21:00 Feb 16 10:00–13:00, 19:00–20:00 Feb 17 11:00–14:00, 19:00–21:00 Feb 18 19:00–21:00 Feb 19 11:00–21:00 Feb 20 10:00–13:00, 20:00–21:00 Feb 21 11:00–15:00, 21:00–22:00 Feb 22 10:00–15:00, 19:00–21:00 Feb 23 11:00–14:00, 19:00–22:00 Feb 24 11:00–13:00, 19:00–21:00 Feb 25 11:00–13:00, 19:00–22:00 Feb 26 10:00–14:00, 16:00–21:00 Feb 27 11:00–13:00, 19:00–21:00 Feb 28 11:00–14:00, 19:00–20:00
March
Mar 1 12:00–21:00 Mar 2 10:00–13:00, 19:00–21:00 Mar 3 10:00–13:00, 19:00–22:00 Mar 4 10:00–13:00, 19:00–20:00 Mar 5 11:00–13:00, 16:00–17:00, 19:00–21:00 Mar 6 10:00–13:00, 19:00–21:00 Mar 7 11:00–14:00, 20:00–21:00 Mar 8 09:00–14:00, 18:00–21:00 Mar 9 10:00–13:00 Mar 10 09:00–13:00, 19:00–21:00 Mar 11 09:00–13:00, 19:00–21:00 Mar 12 10:00–13:00, 16:00–17:00, 19:00–20:00 Mar 13 11:00–14:00 Mar 14 12:00–14:00, 20:00–22:00 Mar 15 11:00–15:00, 18:00–20:00 Mar 16 10:00–14:00, 19:00–21:00 Mar 17 11:00–13:00, 19:00–21:00 Mar 18 10:00–14:00, 20:00–21:00 Mar 19 11:00–13:00, 18:00–19:00 Mar 20 10:00–14:00, 19:00–21:00 Mar 21 11:00–13:00 Mar 22 09:00–14:00, 18:00–20:00 Mar 23 11:00–14:00 Mar 24 10:00–13:00, 19:00–21:00 Mar 25 11:00–14:00, 20:00–21:00 Mar 26 11:00–17:00, 20:00–22:00 Mar 27 10:00–13:00, 19:00–20:00 Mar 28 11:00–14:00, 20:00–21:00 Mar 29 10:00–13:00, 18:00–20:00 Mar 30 10:00–13:00, 18:00–20:00 Mar 31 10:00–12:00, 18:00–20:00
April
Apr 1 09:00–12:00 Apr 2 10:00–13:00, 15:00–16:00, 18:00–20:00 Apr 3 09:00–12:00 Apr 4 10:00–13:00, 19:00–20:00 Apr 5 10:00–13:00, 16:00–19:00 Apr 6 09:00–12:00, 19:00–20:00 Apr 7 10:00–12:00 Apr 8 10:00–12:00 Apr 9 09:00–12:00 Apr 10 09:00–12:00, 19:00–20:00 Apr 11 10:00–12:00 Apr 12 10:00–12:00, 18:00–19:00 Apr 13 10:00–12:00 Apr 14 10:00–12:00, 18:00–20:00 Apr 15 09:00–12:00, 18:00–21:00 Apr 16 10:00–12:00, 17:00–20:00 Apr 17 09:00–11:00, 18:00–19:00 Apr 18 10:00–12:00, 19:00–20:00 Apr 19 08:00–14:00, 18:00–20:00 Apr 20 10:00–12:00, 18:00–20:00 Apr 21 08:00–12:00, 18:00–20:00 Apr 22 10:00–12:00, 18:00–20:00 Apr 23 09:00–12:00, 18:00–20:00 Apr 24 10:00–13:00, 18:00–20:00 Apr 25 10:00–12:00, 20:00–21:00 Apr 26 10:00–12:00, 18:00–20:00 Apr 27 08:00–12:00 Apr 28 10:00–12:00, 19:00–20:00 Apr 29 09:00–13:00, 19:00–20:00 Apr 30 09:00–12:00, 18:00–20:00
May
May 1 19:00–20:00 May 3 10:00–14:00, 19:00–20:00 May 4 09:00–13:00, 18:00–21:00 May 5 09:00–12:00, 19:00–20:00 May 6 10:00–13:00, 19:00–20:00 May 7 10:00–12:00, 18:00–20:00 May 8 09:00–12:00, 19:00–20:00 May 9 10:00–13:00, 18:00–21:00 May 10 09:00–12:00, 14:00–15:00, 18:00–20:00 May 11 09:00–13:00, 19:00–20:00 May 12 10:00–13:00, 18:00–20:00 May 13 08:00–13:00, 18:00–19:00 May 14 09:00–15:00, 19:00–20:00 May 15 08:00–12:00 May 16 10:00–13:00 May 17 08:00–14:00, 18:00–19:00 May 18 09:00–12:00, 18:00–20:00 May 19 08:00–13:00, 19:00–21:00 May 20 09:00–13:00, 19:00–20:00 May 21 08:00–11:00, 17:00–19:00 May 22 10:00–13:00, 19:00–20:00 May 23 09:00–11:00, 18:00–19:00 May 24 10:00–15:00, 17:00–20:00 May 25 08:00–12:00, 19:00–20:00 May 26 10:00–13:00, 19:00–20:00 May 27 08:00–11:00, 19:00–20:00 May 28 09:00–13:00, 17:00–20:00 May 29 08:00–12:00, 18:00–20:00 May 30 10:00–13:00, 19:00–20:00 May 31 10:00–11:00, 13:00–14:00, 18:00–20:00
June
Jun 1 09:00–12:00, 19:00–20:00 Jun 2 09:00–12:00, 19:00–20:00 Jun 3 09:00–12:00, 18:00–19:00 Jun 4 10:00–12:00, 14:00–16:00, 19:00–20:00 Jun 5 11:00–13:00, 19:00–21:00 Jun 6 09:00–10:00, 19:00–20:00 Jun 7 10:00–14:00, 17:00–21:00 Jun 8 09:00–11:00, 18:00–20:00 Jun 9 10:00–13:00, 18:00–20:00 Jun 10 09:00–12:00, 19:00–20:00 Jun 11 10:00–12:00, 17:00–18:00 Jun 12 09:00–12:00, 19:00–20:00 Jun 13 11:00–14:00 Jun 15 09:00–13:00, 19:00–20:00 Jun 16 09:00–12:00, 18:00–19:00 Jun 17 10:00–12:00, 19:00–20:00 Jun 18 11:00–13:00, 19:00–20:00 Jun 19 10:00–13:00, 18:00–20:00 Jun 20 09:00–12:00, 19:00–20:00 Jun 21 10:00–13:00, 19:00–20:00 Jun 22 09:00–12:00, 19:00–20:00 Jun 23 10:00–12:00, 19:00–20:00 Jun 24 09:00–12:00, 18:00–19:00 Jun 25 10:00–14:00, 19:00–20:00 Jun 26 09:00–12:00, 18:00–19:00 Jun 27 11:00–12:00 Jun 28 10:00–12:00 Jun 29 09:00–13:00 Jun 30 09:00–12:00, 19:00–20:00
July
Jul 1 10:00–12:00, 19:00–20:00 Jul 2 08:00–12:00, 17:00–19:00 Jul 3 10:00–12:00 Jul 4 09:00–11:00 Jul 6 09:00–10:00, 18:00–20:00 Jul 7 09:00–11:00, 19:00–20:00 Jul 8 11:00–12:00, 18:00–19:00 Jul 9 10:00–12:00, 19:00–20:00 Jul 10 09:00–11:00, 18:00–20:00 Jul 11 10:00–12:00, 19:00–20:00 Jul 12 10:00–13:00, 17:00–20:00 Jul 13 09:00–12:00, 19:00–20:00 Jul 14 09:00–12:00, 19:00–21:00 Jul 15 12:00–13:00, 19:00–21:00 Jul 16 11:00–12:00, 19:00–20:00 Jul 17 09:00–12:00, 19:00–20:00 Jul 18 11:00–13:00 Jul 19 10:00–12:00, 18:00–20:00 Jul 20 12:00–13:00, 21:00–22:00 Jul 21 10:00–12:00, 19:00–20:00 Jul 22 10:00–12:00, 21:00–22:00 Jul 23 10:00–15:00 Jul 24 00:00–01:00, 11:00–12:00, 20:00–21:00 Jul 25 11:00–12:00 Jul 26 11:00–12:00, 19:00–20:00 Jul 27 08:00–11:00