Most often in June, 26 days.
Highest follower count seen that year: 13,943.
January
Jan 1 10:00–12:00, 15:00–16:00 Jan 2 14:00–16:00, 21:00–23:00 Jan 3 13:00–14:00 Jan 4 13:00–15:00, 20:00–21:00 Jan 5 14:00–16:00, 21:00–22:00 Jan 6 12:00–13:00, 15:00–17:00 Jan 8 12:00–14:00 Jan 10 11:00–15:00, 22:00–23:00 Jan 11 11:00–15:00 Jan 13 14:00–16:00 Jan 14 12:00–14:00 Jan 16 12:00–14:00 Jan 17 12:00–13:00, 21:00–22:00 Jan 18 13:00–14:00, 21:00–22:00 Jan 19 14:00–16:00 Jan 21 13:00–14:00 Jan 24 14:00–16:00 Jan 25 12:00–13:00 Jan 26 15:00–16:00 Jan 28 14:00–15:00 Jan 31 10:00–11:00, 21:00–23:00
February
Feb 1 12:00–13:00, 20:00–22:00 Feb 2 13:00–14:00, 21:00–22:00 Feb 3 13:00–15:00, 20:00–21:00 Feb 4 13:00–14:00, 20:00–21:00 Feb 5 14:00–16:00, 21:00–22:00 Feb 6 11:00–12:00, 14:00–15:00 Feb 7 11:00–13:00, 21:00–22:00 Feb 8 21:00–22:00 Feb 9 13:00–14:00, 22:00–23:00 Feb 10 14:00–16:00 Feb 11 12:00–13:00 Feb 15 15:00–17:00, 20:00–22:00 Feb 16 13:00–15:00 Feb 18 14:00–15:00 Feb 21 12:00–16:00 Feb 22 14:00–16:00, 21:00–22:00 Feb 23 13:00–16:00 Feb 24 14:00–15:00 Feb 25 11:00–13:00, 15:00–16:00, 21:00–23:00 Feb 27 11:00–13:00, 15:00–16:00 Feb 28 22:00–24:00
March
Mar 1 11:00–12:00 Mar 2 13:00–15:00, 21:00–22:00 Mar 3 14:00–15:00, 20:00–22:00 Mar 4 14:00–16:00 Mar 5 15:00–16:00 Mar 6 14:00–15:00 Mar 7 12:00–13:00, 15:00–16:00, 21:00–23:00 Mar 8 21:00–23:00 Mar 9 13:00–15:00 Mar 10 15:00–16:00, 21:00–22:00 Mar 11 11:00–13:00, 15:00–16:00, 21:00–22:00 Mar 12 15:00–16:00 Mar 14 10:00–15:00 Mar 21 18:00–20:00 Mar 22 09:00–11:00, 13:00–14:00, 20:00–21:00 Mar 23 13:00–15:00 Mar 24 14:00–15:00, 20:00–22:00 Mar 25 11:00–12:00, 14:00–15:00 Mar 26 14:00–16:00 Mar 27 15:00–16:00, 21:00–22:00 Mar 28 21:00–22:00 Mar 29 09:00–10:00, 13:00–14:00, 19:00–21:00 Mar 30 12:00–13:00, 21:00–22:00 Mar 31 12:00–14:00
April
Apr 1 12:00–14:00, 20:00–21:00 Apr 2 13:00–14:00 Apr 3 12:00–13:00 Apr 5 12:00–13:00, 19:00–20:00 Apr 6 09:00–10:00, 12:00–13:00 Apr 7 13:00–14:00 Apr 8 12:00–14:00 Apr 9 13:00–14:00 Apr 11 09:00–10:00, 13:00–14:00, 19:00–21:00 Apr 12 12:00–13:00 Apr 13 12:00–14:00, 19:00–21:00 Apr 16 15:00–16:00, 20:00–22:00 Apr 17 12:00–15:00, 20:00–21:00 Apr 18 09:00–10:00, 12:00–14:00 Apr 19 12:00–14:00, 19:00–20:00 Apr 20 09:00–11:00, 13:00–14:00 Apr 21 20:00–21:00 Apr 22 13:00–14:00 Apr 23 13:00–14:00, 19:00–20:00 Apr 24 12:00–14:00, 20:00–21:00 Apr 25 09:00–12:00, 18:00–19:00 Apr 26 12:00–14:00 Apr 27 12:00–14:00
May
May 1 14:00–15:00, 19:00–21:00 May 3 11:00–16:00 May 4 09:00–13:00, 18:00–19:00 May 5 13:00–14:00 May 6 12:00–13:00 May 7 12:00–15:00 May 9 08:00–13:00, 15:00–16:00 May 10 10:00–12:00, 14:00–15:00 May 11 13:00–15:00 May 12 13:00–14:00 May 13 11:00–14:00, 18:00–19:00 May 14 09:00–10:00, 12:00–13:00 May 15 12:00–14:00 May 16 10:00–11:00, 13:00–14:00 May 17 09:00–10:00, 13:00–14:00 May 18 10:00–14:00 May 19 14:00–15:00 May 20 09:00–10:00 May 23 09:00–11:00, 13:00–15:00 May 24 13:00–14:00 May 25 11:00–12:00 May 26 13:00–14:00 May 27 09:00–10:00, 12:00–13:00 May 29 14:00–15:00 May 30 09:00–10:00
June
Jun 1 12:00–15:00, 18:00–19:00 Jun 2 13:00–14:00 Jun 3 09:00–13:00, 19:00–20:00 Jun 4 09:00–10:00, 13:00–16:00 Jun 5 11:00–12:00, 14:00–15:00 Jun 6 20:00–21:00 Jun 7 09:00–12:00 Jun 8 08:00–09:00, 18:00–19:00 Jun 9 14:00–15:00, 19:00–20:00 Jun 10 07:00–08:00, 12:00–13:00 Jun 11 14:00–15:00, 19:00–20:00 Jun 12 10:00–14:00 Jun 13 11:00–15:00 Jun 15 10:00–14:00 Jun 16 13:00–14:00 Jun 17 13:00–14:00, 18:00–19:00 Jun 18 13:00–14:00 Jun 19 10:00–11:00, 13:00–14:00, 20:00–21:00 Jun 20 08:00–11:00 Jun 21 13:00–15:00, 18:00–19:00 Jun 22 10:00–14:00, 20:00–21:00 Jun 23 13:00–15:00, 20:00–21:00 Jun 24 08:00–09:00 Jun 26 13:00–15:00 Jun 27 13:00–14:00 Jun 29 09:00–10:00, 13:00–14:00, 19:00–20:00
July
Jul 1 10:00–11:00, 18:00–20:00 Jul 2 10:00–11:00 Jul 4 09:00–12:00, 18:00–19:00 Jul 5 09:00–10:00, 13:00–15:00 Jul 6 11:00–13:00 Jul 7 09:00–10:00, 18:00–19:00 Jul 8 09:00–10:00, 13:00–14:00 Jul 9 15:00–16:00 Jul 11 14:00–15:00 Jul 12 18:00–19:00 Jul 13 14:00–15:00, 20:00–22:00 Jul 14 14:00–15:00, 20:00–21:00 Jul 15 11:00–12:00, 15:00–16:00 Jul 16 14:00–15:00 Jul 17 14:00–15:00 Jul 18 10:00–13:00 Jul 19 12:00–15:00 Jul 20 12:00–14:00 Jul 21 13:00–15:00 Jul 22 13:00–14:00 Jul 23 14:00–16:00 Jul 24 11:00–12:00, 18:00–19:00 Jul 25 11:00–12:00, 19:00–20:00 Jul 26 13:00–14:00 Jul 27 12:00–13:00