Most often in March, 26 days.
Highest follower count seen that year: 2,986.
January
Jan 1 20:00–22:00 Jan 2 20:00–21:00 Jan 3 00:00–01:00, 20:00–21:00 Jan 4 19:00–21:00 Jan 6 19:00–22:00 Jan 7 20:00–21:00 Jan 9 20:00–21:00, 23:00–24:00 Jan 10 18:00–19:00 Jan 11 19:00–20:00 Jan 12 21:00–23:00 Jan 13 17:00–19:00 Jan 14 22:00–24:00 Jan 15 02:00–03:00, 20:00–21:00 Jan 16 00:00–01:00 Jan 17 22:00–23:00 Jan 18 19:00–21:00 Jan 21 00:00–01:00 Jan 23 01:00–03:00 Jan 25 19:00–20:00 Jan 26 19:00–20:00 Jan 27 18:00–20:00 Jan 28 18:00–20:00 Jan 29 18:00–19:00, 21:00–22:00 Jan 30 18:00–20:00, 22:00–23:00 Jan 31 18:00–21:00
February
Feb 3 21:00–22:00 Feb 4 23:00–24:00 Feb 5 00:00–01:00, 06:00–07:00, 23:00–24:00 Feb 6 05:00–06:00, 23:00–24:00 Feb 7 00:00–01:00, 19:00–20:00 Feb 8 19:00–20:00 Feb 9 19:00–20:00 Feb 10 18:00–19:00 Feb 13 23:00–24:00 Feb 14 17:00–20:00 Feb 17 20:00–24:00 Feb 18 19:00–20:00 Feb 20 17:00–18:00 Feb 21 18:00–19:00 Feb 22 18:00–21:00 Feb 24 17:00–18:00, 20:00–21:00 Feb 25 22:00–23:00 Feb 26 20:00–21:00, 23:00–24:00 Feb 27 19:00–20:00, 22:00–23:00
March
Mar 1 19:00–20:00 Mar 2 20:00–21:00 Mar 3 02:00–03:00, 07:00–08:00, 17:00–18:00 Mar 4 18:00–20:00, 22:00–23:00 Mar 6 18:00–19:00 Mar 7 18:00–21:00 Mar 8 19:00–20:00, 22:00–23:00 Mar 9 22:00–23:00 Mar 10 20:00–23:00 Mar 11 17:00–18:00, 21:00–22:00 Mar 12 21:00–22:00 Mar 13 17:00–18:00, 22:00–23:00 Mar 15 19:00–20:00 Mar 18 16:00–19:00 Mar 19 18:00–21:00 Mar 20 17:00–19:00, 22:00–23:00 Mar 21 18:00–20:00 Mar 22 23:00–24:00 Mar 24 19:00–20:00 Mar 25 19:00–20:00 Mar 26 18:00–19:00 Mar 27 17:00–18:00 Mar 28 22:00–23:00 Mar 29 00:00–01:00, 19:00–20:00 Mar 30 16:00–17:00, 19:00–20:00 Mar 31 17:00–19:00, 21:00–22:00
April
Apr 1 17:00–18:00, 20:00–21:00 Apr 2 17:00–18:00, 23:00–24:00 Apr 3 17:00–19:00, 21:00–22:00 Apr 4 16:00–17:00, 22:00–23:00 Apr 5 19:00–20:00 Apr 7 19:00–22:00 Apr 8 20:00–23:00 Apr 9 16:00–17:00, 21:00–22:00 Apr 10 19:00–20:00 Apr 12 01:00–02:00, 18:00–19:00 Apr 13 20:00–21:00 Apr 14 18:00–19:00 Apr 16 23:00–24:00 Apr 21 20:00–21:00 Apr 22 17:00–18:00 Apr 23 19:00–23:00 Apr 24 17:00–18:00, 20:00–21:00 Apr 25 18:00–19:00, 23:00–24:00 Apr 27 19:00–20:00 Apr 29 16:00–17:00
May
May 1 18:00–19:00 May 2 17:00–18:00 May 3 07:00–08:00, 17:00–19:00 May 6 21:00–22:00 May 7 20:00–21:00 May 8 19:00–21:00 May 9 16:00–23:00 May 10 17:00–20:00, 22:00–23:00 May 12 20:00–21:00 May 13 20:00–21:00 May 15 00:00–01:00 May 16 00:00–02:00 May 17 20:00–21:00 May 19 16:00–17:00 May 20 22:00–23:00 May 21 20:00–21:00 May 22 21:00–22:00 May 23 19:00–20:00 May 24 19:00–20:00 May 25 21:00–22:00 May 27 18:00–22:00 May 29 18:00–20:00 May 30 18:00–19:00
June
Jun 1 18:00–19:00 Jun 2 21:00–22:00 Jun 4 18:00–19:00 Jun 6 17:00–18:00 Jun 7 21:00–22:00 Jun 8 19:00–20:00 Jun 10 20:00–21:00 Jun 12 17:00–18:00 Jun 15 17:00–18:00 Jun 16 19:00–20:00 Jun 22 20:00–23:00 Jun 23 21:00–22:00 Jun 25 19:00–20:00 Jun 26 20:00–21:00 Jun 27 01:00–02:00, 23:00–24:00 Jun 30 22:00–23:00
July
Jul 3 20:00–21:00 Jul 4 21:00–22:00 Jul 5 18:00–19:00 Jul 7 21:00–22:00 Jul 13 22:00–24:00 Jul 15 23:00–24:00 Jul 16 23:00–24:00 Jul 17 18:00–21:00 Jul 18 21:00–22:00 Jul 19 18:00–19:00 Jul 20 18:00–19:00 Jul 22 19:00–20:00 Jul 27 23:00–24:00 Jul 29 22:00–23:00 Jul 30 23:00–24:00 Jul 31 18:00–19:00
August
Aug 1 22:00–23:00 Aug 2 17:00–18:00 Aug 3 21:00–22:00 Aug 4 18:00–19:00, 21:00–22:00 Aug 5 17:00–18:00, 20:00–21:00 Aug 6 21:00–22:00 Aug 9 01:00–02:00 Aug 12 17:00–18:00, 20:00–21:00 Aug 16 17:00–18:00, 20:00–21:00 Aug 17 22:00–23:00 Aug 18 01:00–02:00 Aug 19 21:00–22:00 Aug 20 17:00–18:00, 21:00–22:00 Aug 24 17:00–19:00 Aug 27 00:00–01:00, 16:00–17:00, 21:00–22:00 Aug 28 21:00–23:00 Aug 30 02:00–03:00, 19:00–22:00 Aug 31 19:00–21:00
September
Sep 2 00:00–01:00, 21:00–24:00 Sep 3 20:00–21:00 Sep 4 20:00–21:00 Sep 5 18:00–20:00 Sep 6 21:00–22:00 Sep 7 01:00–02:00, 18:00–19:00 Sep 8 18:00–19:00 Sep 9 18:00–19:00 Sep 11 02:00–03:00, 17:00–18:00 Sep 12 18:00–19:00, 21:00–22:00 Sep 14 18:00–21:00 Sep 15 19:00–20:00 Sep 16 19:00–20:00 Sep 18 21:00–22:00 Sep 19 21:00–22:00 Sep 20 19:00–22:00 Sep 21 21:00–22:00 Sep 22 19:00–20:00 Sep 23 02:00–03:00 Sep 24 22:00–23:00 Sep 25 00:00–01:00, 18:00–22:00 Sep 26 19:00–20:00 Sep 27 00:00–01:00, 21:00–22:00 Sep 28 00:00–01:00, 19:00–20:00, 22:00–23:00 Sep 30 19:00–20:00
October
Oct 1 18:00–19:00 Oct 3 20:00–21:00 Oct 5 00:00–01:00, 17:00–19:00, 21:00–22:00 Oct 7 23:00–24:00 Oct 8 04:00–06:00 Oct 9 19:00–22:00 Oct 10 20:00–22:00 Oct 11 18:00–19:00, 22:00–23:00 Oct 13 19:00–20:00 Oct 14 20:00–21:00 Oct 15 17:00–18:00 Oct 16 18:00–19:00, 21:00–22:00 Oct 18 20:00–21:00 Oct 19 01:00–02:00, 19:00–20:00 Oct 20 21:00–22:00 Oct 21 17:00–18:00 Oct 24 18:00–19:00, 21:00–22:00 Oct 26 21:00–22:00 Oct 30 20:00–21:00 Oct 31 18:00–19:00
November
Nov 3 20:00–21:00 Nov 5 19:00–20:00 Nov 7 20:00–21:00 Nov 8 18:00–19:00 Nov 11 19:00–20:00 Nov 15 18:00–19:00 Nov 18 19:00–20:00 Nov 21 23:00–24:00 Nov 22 22:00–23:00 Nov 24 23:00–24:00 Nov 29 20:00–21:00 Nov 30 20:00–21:00
December
Dec 3 19:00–20:00 Dec 6 05:00–06:00 Dec 7 20:00–21:00 Dec 11 21:00–22:00 Dec 12 21:00–22:00 Dec 15 22:00–23:00 Dec 23 22:00–23:00 Dec 28 00:00–01:00