Most often in March, 24 days.
Highest follower count seen that year: 26,495.
January
Jan 1 19:00–22:00 Jan 2 19:00–22:00 Jan 3 19:00–22:00 Jan 5 19:00–22:00 Jan 6 19:00–21:00 Jan 7 19:00–20:00 Jan 9 19:00–21:00 Jan 10 19:00–22:00 Jan 12 19:00–21:00 Jan 13 19:00–20:00 Jan 15 19:00–21:00 Jan 16 19:00–21:00 Jan 18 19:00–20:00 Jan 21 19:00–21:00 Jan 24 19:00–20:00 Jan 25 19:00–21:00 Jan 27 19:00–21:00 Jan 28 19:00–20:00 Jan 29 19:00–22:00 Jan 30 19:00–21:00 Jan 31 19:00–22:00
February
Feb 1 19:00–22:00 Feb 2 19:00–21:00 Feb 3 19:00–21:00 Feb 4 19:00–22:00 Feb 5 19:00–23:00 Feb 6 19:00–21:00 Feb 7 19:00–22:00 Feb 8 20:00–22:00 Feb 9 19:00–22:00 Feb 12 19:00–24:00 Feb 13 00:00–01:00, 20:00–23:00 Feb 14 20:00–23:00 Feb 15 21:00–23:00 Feb 17 19:00–23:00 Feb 18 22:00–24:00 Feb 19 00:00–01:00 Feb 20 20:00–23:00 Feb 22 20:00–22:00 Feb 23 20:00–23:00 Feb 25 20:00–23:00
March
Mar 1 20:00–23:00 Mar 2 19:00–22:00 Mar 5 19:00–22:00 Mar 6 19:00–22:00 Mar 7 19:00–23:00 Mar 9 19:00–21:00 Mar 10 19:00–21:00 Mar 12 19:00–23:00 Mar 13 19:00–23:00 Mar 14 19:00–22:00 Mar 17 20:00–23:00 Mar 19 02:00–05:00 Mar 20 00:00–04:00 Mar 21 01:00–03:00 Mar 22 00:00–03:00 Mar 23 01:00–04:00 Mar 24 01:00–03:00 Mar 25 00:00–04:00 Mar 26 00:00–04:00 Mar 27 00:00–03:00 Mar 28 01:00–05:00 Mar 29 00:00–03:00 Mar 30 02:00–04:00 Mar 31 00:00–04:00
April
Apr 4 00:00–03:00 Apr 6 02:00–04:00 Apr 8 01:00–04:00 Apr 10 00:00–02:00 Apr 12 01:00–03:00 Apr 14 01:00–04:00 Apr 17 01:00–04:00 Apr 22 00:00–04:00, 23:00–24:00 Apr 23 00:00–02:00, 23:00–24:00 Apr 24 00:00–01:00 Apr 27 00:00–03:00 Apr 30 02:00–06:00
May
May 8 08:00–10:00 May 9 11:00–13:00 May 10 03:00–06:00 May 12 02:00–03:00 May 14 00:00–02:00 May 19 01:00–04:00 May 21 02:00–03:00 May 22 01:00–03:00, 23:00–24:00 May 23 00:00–02:00 May 24 23:00–24:00 May 25 00:00–01:00 May 26 00:00–04:00 May 28 23:00–24:00 May 29 00:00–03:00, 23:00–24:00 May 30 00:00–02:00 May 31 00:00–03:00, 23:00–24:00
June
Jun 1 00:00–03:00, 23:00–24:00 Jun 2 00:00–01:00 Jun 3 23:00–24:00 Jun 4 00:00–02:00 Jun 10 00:00–03:00 Jun 18 01:00–03:00 Jun 19 00:00–03:00 Jun 21 22:00–24:00 Jun 22 00:00–03:00, 23:00–24:00 Jun 23 00:00–02:00 Jun 24 23:00–24:00 Jun 25 00:00–01:00, 21:00–23:00 Jun 28 00:00–03:00
July
Jul 1 00:00–03:00 Jul 5 00:00–05:00 Jul 6 23:00–24:00 Jul 7 00:00–04:00 Jul 8 23:00–24:00 Jul 9 00:00–05:00 Jul 10 00:00–05:00 Jul 13 00:00–04:00 Jul 14 00:00–04:00 Jul 15 23:00–24:00 Jul 16 00:00–04:00 Jul 19 23:00–24:00 Jul 20 00:00–02:00 Jul 21 23:00–24:00 Jul 22 00:00–02:00 Jul 23 00:00–04:00 Jul 24 00:00–04:00 Jul 25 02:00–05:00 Jul 27 23:00–24:00 Jul 28 00:00–01:00
August
Aug 6 09:00–11:00 Aug 7 23:00–24:00 Aug 10 13:00–24:00 Aug 12 10:00–13:00, 17:00–19:00 Aug 13 19:00–23:00 Aug 14 20:00–24:00 Aug 15 00:00–01:00, 17:00–24:00 Aug 16 00:00–01:00, 22:00–24:00 Aug 17 00:00–02:00 Aug 19 21:00–24:00 Aug 20 00:00–01:00 Aug 21 21:00–24:00 Aug 22 00:00–02:00, 23:00–24:00 Aug 23 00:00–01:00 Aug 24 02:00–03:00 Aug 31 11:00–16:00
September
Sep 2 13:00–16:00 Sep 4 14:00–16:00 Sep 5 08:00–11:00 Sep 9 09:00–14:00 Sep 10 17:00–19:00 Sep 12 10:00–13:00 Sep 13 17:00–20:00 Sep 14 17:00–20:00 Sep 16 19:00–23:00 Sep 18 19:00–22:00 Sep 19 21:00–23:00 Sep 22 19:00–23:00 Sep 23 21:00–23:00 Sep 27 20:00–21:00 Sep 28 19:00–23:00 Sep 29 20:00–22:00
October
Oct 3 21:00–24:00 Oct 6 19:00–21:00 Oct 7 21:00–24:00 Oct 8 21:00–23:00 Oct 9 21:00–23:00 Oct 12 21:00–23:00 Oct 15 21:00–23:00 Oct 16 20:00–23:00 Oct 17 20:00–23:00 Oct 19 21:00–23:00 Oct 20 21:00–23:00 Oct 23 21:00–24:00 Oct 25 20:00–23:00 Oct 26 22:00–24:00 Oct 27 00:00–02:00, 20:00–23:00 Oct 29 20:00–23:00 Oct 30 21:00–24:00 Oct 31 00:00–01:00
November
Nov 3 19:00–24:00 Nov 4 20:00–23:00 Nov 5 20:00–21:00 Nov 6 20:00–24:00 Nov 9 20:00–23:00 Nov 10 21:00–24:00 Nov 11 00:00–01:00, 20:00–24:00 Nov 12 00:00–01:00, 20:00–22:00 Nov 15 21:00–22:00 Nov 17 01:00–05:00, 10:00–12:00 Nov 18 00:00–02:00 Nov 21 20:00–22:00 Nov 22 20:00–24:00 Nov 23 00:00–01:00, 23:00–24:00 Nov 24 00:00–03:00 Nov 25 00:00–03:00 Nov 30 22:00–24:00
December
Dec 1 00:00–02:00 Dec 4 23:00–24:00 Dec 5 00:00–02:00 Dec 6 00:00–02:00, 22:00–24:00 Dec 7 00:00–02:00, 21:00–24:00 Dec 8 00:00–01:00 Dec 11 00:00–03:00 Dec 12 22:00–24:00 Dec 13 00:00–04:00, 23:00–24:00 Dec 14 00:00–03:00, 22:00–24:00 Dec 15 00:00–01:00, 23:00–24:00 Dec 16 00:00–02:00, 23:00–24:00 Dec 17 00:00–04:00 Dec 18 01:00–03:00 Dec 19 01:00–03:00, 22:00–23:00 Dec 24 23:00–24:00 Dec 25 00:00–01:00