Most often in January, 26 days.
Highest follower count seen that year: 9,850.
January
Jan 2 18:00–19:00 Jan 3 17:00–20:00 Jan 4 18:00–20:00 Jan 5 19:00–20:00 Jan 6 17:00–19:00 Jan 7 17:00–19:00 Jan 9 19:00–20:00 Jan 10 18:00–20:00 Jan 11 20:00–22:00 Jan 12 18:00–19:00 Jan 13 19:00–20:00 Jan 14 18:00–19:00 Jan 15 18:00–20:00 Jan 16 18:00–20:00 Jan 17 17:00–20:00 Jan 18 17:00–21:00 Jan 19 18:00–20:00 Jan 20 17:00–21:00 Jan 21 19:00–20:00 Jan 23 19:00–20:00 Jan 24 18:00–22:00 Jan 25 18:00–21:00 Jan 26 17:00–19:00 Jan 29 17:00–23:00 Jan 30 17:00–20:00 Jan 31 18:00–22:00
February
Feb 1 18:00–21:00 Feb 2 11:00–13:00, 18:00–20:00 Feb 3 17:00–21:00 Feb 4 17:00–24:00 Feb 5 00:00–01:00, 18:00–19:00 Feb 6 18:00–21:00 Feb 7 17:00–18:00, 20:00–22:00 Feb 8 18:00–23:00 Feb 9 18:00–20:00 Feb 10 19:00–21:00 Feb 11 18:00–22:00 Feb 13 17:00–19:00 Feb 15 18:00–19:00
March
Mar 1 15:00–20:00 Mar 2 13:00–14:00, 17:00–21:00 Mar 3 17:00–22:00 Mar 5 20:00–21:00 Mar 6 19:00–20:00 Mar 8 18:00–21:00 Mar 9 18:00–22:00 Mar 10 18:00–20:00 Mar 11 17:00–20:00 Mar 14 17:00–23:00 Mar 15 17:00–22:00 Mar 16 18:00–20:00 Mar 18 18:00–21:00 Mar 20 17:00–20:00 Mar 23 18:00–19:00 Mar 25 18:00–19:00 Mar 27 18:00–20:00 Mar 28 19:00–20:00 Mar 29 18:00–21:00
April
Apr 3 18:00–21:00 Apr 4 18:00–21:00 Apr 5 17:00–19:00 Apr 7 17:00–20:00 Apr 8 17:00–21:00 Apr 9 09:00–12:00 Apr 10 19:00–21:00 Apr 11 19:00–21:00 Apr 12 18:00–19:00 Apr 13 18:00–19:00 Apr 14 18:00–22:00 Apr 15 17:00–20:00 Apr 16 18:00–20:00 Apr 17 18:00–21:00 Apr 18 18:00–20:00 Apr 20 18:00–20:00 Apr 21 16:00–20:00 Apr 22 18:00–20:00 Apr 25 17:00–19:00 Apr 26 17:00–20:00 Apr 28 19:00–20:00
May
May 3 17:00–23:00 May 4 17:00–20:00 May 5 18:00–20:00 May 6 20:00–23:00 May 7 18:00–21:00 May 8 18:00–19:00 May 9 18:00–19:00 May 11 17:00–23:00 May 12 18:00–21:00 May 14 18:00–21:00 May 15 18:00–19:00 May 17 18:00–22:00 May 18 18:00–22:00 May 19 19:00–21:00 May 20 18:00–20:00 May 22 18:00–20:00 May 23 18:00–20:00
June
Jun 1 18:00–21:00 Jun 2 18:00–21:00 Jun 3 18:00–22:00 Jun 4 18:00–22:00 Jun 5 19:00–21:00 Jun 11 18:00–20:00 Jun 13 17:00–18:00 Jun 15 19:00–21:00 Jun 24 18:00–20:00 Jun 25 18:00–22:00 Jun 26 18:00–20:00
July
Jul 2 18:00–22:00 Jul 3 18:00–21:00 Jul 4 18:00–19:00 Jul 6 18:00–22:00 Jul 7 17:00–19:00 Jul 8 18:00–21:00 Jul 9 18:00–21:00 Jul 11 19:00–21:00 Jul 12 17:00–21:00 Jul 14 18:00–22:00 Jul 15 18:00–21:00 Jul 16 17:00–22:00 Jul 18 18:00–19:00 Jul 22 18:00–22:00 Jul 23 18:00–22:00 Jul 24 18:00–22:00 Jul 25 18:00–21:00 Jul 26 22:00–24:00 Jul 27 01:00–03:00 Jul 28 00:00–02:00, 23:00–24:00 Jul 29 00:00–03:00, 23:00–24:00 Jul 30 18:00–22:00 Jul 31 00:00–01:00, 18:00–20:00
August
Aug 1 00:00–03:00, 23:00–24:00 Aug 2 00:00–02:00 Aug 4 00:00–03:00 Aug 6 00:00–02:00 Aug 11 23:00–24:00 Aug 12 00:00–01:00 Aug 13 23:00–24:00 Aug 14 00:00–01:00 Aug 18 18:00–21:00 Aug 20 00:00–02:00 Aug 22 17:00–21:00 Aug 23 18:00–21:00 Aug 24 19:00–23:00 Aug 25 17:00–24:00 Aug 26 19:00–21:00
September
Sep 9 18:00–23:00 Sep 10 18:00–21:00 Sep 12 18:00–22:00 Sep 13 18:00–23:00 Sep 14 18:00–21:00 Sep 15 18:00–22:00 Sep 16 18:00–20:00 Sep 17 18:00–21:00 Sep 18 18:00–20:00 Sep 19 18:00–22:00 Sep 20 18:00–21:00 Sep 21 18:00–23:00 Sep 22 00:00–01:00, 19:00–23:00 Sep 23 18:00–23:00 Sep 24 18:00–21:00 Sep 25 19:00–23:00 Sep 27 18:00–22:00 Sep 29 18:00–22:00
October
Oct 3 18:00–22:00 Oct 5 18:00–21:00 Oct 6 19:00–21:00 Oct 7 19:00–23:00 Oct 8 19:00–23:00 Oct 15 19:00–20:00 Oct 16 18:00–21:00 Oct 28 18:00–19:00 Oct 29 17:00–21:00 Oct 30 18:00–21:00 Oct 31 17:00–21:00
November
Nov 1 18:00–21:00 Nov 2 18:00–20:00 Nov 16 19:00–23:00 Nov 17 18:00–22:00 Nov 18 19:00–22:00 Nov 19 17:00–20:00 Nov 20 18:00–23:00 Nov 21 18:00–24:00 Nov 22 18:00–24:00 Nov 23 19:00–21:00 Nov 24 18:00–22:00 Nov 25 19:00–24:00 Nov 26 18:00–23:00 Nov 27 18:00–24:00 Nov 28 19:00–24:00 Nov 29 20:00–23:00 Nov 30 19:00–22:00
December
Dec 2 19:00–22:00 Dec 3 19:00–22:00 Dec 4 18:00–21:00 Dec 6 19:00–22:00 Dec 7 18:00–21:00 Dec 9 19:00–24:00 Dec 11 18:00–22:00 Dec 12 19:00–22:00 Dec 13 18:00–24:00 Dec 14 18:00–22:00 Dec 15 19:00–22:00 Dec 16 19:00–24:00 Dec 22 19:00–23:00 Dec 23 18:00–22:00 Dec 24 19:00–23:00 Dec 25 18:00–22:00 Dec 26 19:00–23:00 Dec 27 18:00–24:00 Dec 29 19:00–23:00 Dec 30 19:00–24:00