Most often in March, 26 days.
Highest follower count seen that year: 25,686.
January
Jan 4 22:00–24:00 Jan 5 00:00–02:00, 21:00–24:00 Jan 6 00:00–02:00 Jan 8 21:00–24:00 Jan 9 00:00–03:00, 21:00–24:00 Jan 10 00:00–03:00 Jan 11 21:00–24:00 Jan 12 00:00–03:00, 21:00–24:00 Jan 15 21:00–24:00 Jan 16 00:00–01:00, 21:00–24:00 Jan 17 00:00–03:00, 20:00–24:00 Jan 20 20:00–24:00 Jan 21 00:00–01:00 Jan 22 20:00–24:00 Jan 23 00:00–01:00, 20:00–22:00 Jan 24 21:00–24:00 Jan 25 00:00–04:00 Jan 26 21:00–24:00 Jan 27 00:00–03:00, 21:00–24:00 Jan 28 00:00–03:00 Jan 29 20:00–24:00 Jan 30 00:00–03:00, 20:00–24:00 Jan 31 00:00–03:00, 20:00–24:00
February
Feb 1 00:00–03:00 Feb 2 22:00–24:00 Feb 3 00:00–04:00, 20:00–24:00 Feb 4 00:00–01:00 Feb 5 20:00–24:00 Feb 6 00:00–01:00, 20:00–24:00 Feb 7 00:00–04:00, 20:00–24:00 Feb 8 00:00–04:00 Feb 9 20:00–24:00 Feb 10 21:00–23:00 Feb 12 20:00–24:00 Feb 13 00:00–01:00, 20:00–24:00 Feb 14 00:00–02:00, 21:00–24:00 Feb 15 00:00–04:00 Feb 16 20:00–24:00 Feb 17 00:00–02:00, 20:00–24:00 Feb 18 00:00–02:00 Feb 19 21:00–24:00 Feb 20 00:00–03:00, 21:00–24:00 Feb 21 00:00–03:00, 21:00–24:00 Feb 22 00:00–02:00 Feb 25 20:00–24:00 Feb 26 00:00–02:00, 20:00–24:00 Feb 27 00:00–01:00, 20:00–24:00 Feb 28 00:00–03:00, 20:00–24:00
March
Mar 1 00:00–02:00, 20:00–24:00 Mar 2 00:00–04:00, 20:00–24:00 Mar 3 00:00–03:00 Mar 5 20:00–24:00 Mar 6 00:00–03:00, 20:00–24:00 Mar 7 00:00–03:00, 21:00–24:00 Mar 8 00:00–02:00, 21:00–24:00 Mar 9 00:00–04:00, 20:00–24:00 Mar 10 00:00–01:00 Mar 12 20:00–24:00 Mar 13 00:00–03:00, 21:00–24:00 Mar 14 00:00–03:00, 21:00–24:00 Mar 15 00:00–03:00, 20:00–24:00 Mar 16 00:00–02:00, 21:00–24:00 Mar 17 00:00–04:00 Mar 19 20:00–24:00 Mar 20 00:00–03:00, 21:00–24:00 Mar 21 00:00–01:00, 19:00–24:00 Mar 22 00:00–04:00, 20:00–24:00 Mar 23 00:00–03:00, 20:00–24:00 Mar 24 00:00–03:00 Mar 26 20:00–24:00 Mar 27 00:00–03:00, 20:00–24:00 Mar 28 00:00–02:00, 20:00–24:00 Mar 30 19:00–24:00 Mar 31 00:00–01:00, 19:00–22:00
April
Apr 2 19:00–24:00 Apr 3 00:00–02:00, 19:00–24:00 Apr 4 00:00–01:00, 19:00–24:00 Apr 5 19:00–23:00 Apr 9 20:00–24:00 Apr 10 00:00–02:00, 19:00–24:00 Apr 11 00:00–02:00, 19:00–24:00 Apr 12 00:00–02:00, 19:00–24:00 Apr 13 00:00–02:00, 20:00–23:00 Apr 14 20:00–24:00 Apr 16 20:00–23:00 Apr 17 19:00–24:00 Apr 18 00:00–01:00, 19:00–21:00 Apr 23 20:00–24:00 Apr 24 20:00–22:00 Apr 25 20:00–24:00 Apr 26 00:00–03:00, 20:00–23:00 Apr 27 20:00–24:00 Apr 28 00:00–01:00 Apr 29 20:00–24:00 Apr 30 00:00–01:00
May
May 1 19:00–24:00 May 2 00:00–02:00 May 4 20:00–22:00 May 6 19:00–24:00 May 7 20:00–24:00 May 8 00:00–02:00, 20:00–24:00 May 9 00:00–02:00, 19:00–24:00 May 10 00:00–02:00, 19:00–24:00 May 11 00:00–03:00, 19:00–24:00 May 12 00:00–02:00 May 14 20:00–24:00 May 15 00:00–02:00, 19:00–24:00 May 16 00:00–01:00, 20:00–24:00 May 17 00:00–02:00, 20:00–24:00 May 18 00:00–01:00, 20:00–24:00 May 21 20:00–24:00 May 22 00:00–03:00, 20:00–24:00 May 24 20:00–24:00 May 25 00:00–02:00, 20:00–23:00 May 28 20:00–24:00 May 29 00:00–02:00, 20:00–24:00 May 30 19:00–24:00 May 31 00:00–01:00, 20:00–24:00
June
Jun 1 00:00–02:00, 19:00–23:00 Jun 4 20:00–24:00 Jun 5 00:00–03:00, 20:00–24:00 Jun 6 00:00–01:00, 19:00–24:00 Jun 7 00:00–02:00, 20:00–24:00 Jun 8 00:00–01:00, 20:00–22:00 Jun 11 19:00–24:00 Jun 12 00:00–02:00, 21:00–24:00 Jun 13 00:00–02:00, 19:00–24:00 Jun 14 00:00–02:00, 20:00–24:00 Jun 15 00:00–03:00, 19:00–24:00 Jun 16 00:00–01:00 Jun 18 20:00–24:00 Jun 19 00:00–03:00, 20:00–24:00 Jun 20 00:00–01:00, 20:00–24:00 Jun 21 00:00–03:00, 20:00–24:00 Jun 27 19:00–24:00 Jun 28 00:00–01:00, 20:00–24:00 Jun 29 00:00–03:00, 20:00–24:00 Jun 30 00:00–02:00, 20:00–24:00
July
Jul 1 00:00–01:00 Jul 2 20:00–24:00 Jul 3 00:00–03:00, 20:00–24:00 Jul 4 00:00–03:00, 20:00–24:00 Jul 5 00:00–03:00, 20:00–24:00 Jul 6 00:00–03:00, 20:00–24:00 Jul 7 00:00–03:00 Jul 9 19:00–24:00 Jul 10 20:00–24:00 Jul 11 00:00–03:00, 20:00–24:00 Jul 12 00:00–02:00, 20:00–24:00 Jul 13 20:00–24:00 Jul 14 00:00–02:00 Jul 16 21:00–23:00 Jul 17 20:00–24:00 Jul 18 00:00–01:00, 20:00–23:00 Jul 19 20:00–24:00 Jul 20 00:00–02:00, 20:00–24:00 Jul 21 00:00–03:00 Jul 23 20:00–24:00 Jul 24 00:00–03:00, 20:00–24:00 Jul 25 00:00–02:00, 20:00–24:00 Jul 26 00:00–02:00, 20:00–24:00 Jul 27 20:00–23:00 Jul 31 19:00–24:00
August
Aug 1 00:00–03:00, 19:00–24:00 Aug 2 00:00–02:00, 20:00–24:00 Aug 3 00:00–02:00, 20:00–23:00 Aug 5 20:00–23:00 Aug 6 19:00–24:00 Aug 7 00:00–01:00, 20:00–24:00 Aug 8 00:00–03:00, 21:00–24:00 Aug 9 20:00–24:00 Aug 10 00:00–02:00 Aug 12 20:00–24:00 Aug 13 21:00–24:00 Aug 14 00:00–01:00, 20:00–23:00 Aug 15 19:00–24:00 Aug 16 00:00–01:00, 20:00–23:00 Aug 17 20:00–24:00 Aug 18 00:00–01:00 Aug 21 20:00–24:00 Aug 22 00:00–03:00, 20:00–24:00 Aug 23 00:00–01:00, 20:00–24:00 Aug 24 00:00–02:00, 19:00–24:00 Aug 25 00:00–04:00 Aug 27 19:00–24:00 Aug 28 00:00–01:00, 20:00–24:00 Aug 29 00:00–02:00, 19:00–24:00 Aug 30 00:00–03:00, 20:00–24:00 Aug 31 00:00–04:00, 19:00–24:00
September
Sep 1 00:00–02:00 Sep 3 20:00–24:00 Sep 4 00:00–03:00, 20:00–24:00 Sep 5 00:00–03:00, 20:00–21:00 Sep 6 20:00–24:00 Sep 7 00:00–02:00, 20:00–24:00 Sep 8 00:00–02:00 Sep 10 20:00–24:00 Sep 11 20:00–24:00 Sep 12 00:00–04:00, 20:00–24:00 Sep 13 00:00–03:00, 20:00–24:00 Sep 14 00:00–02:00, 20:00–24:00 Sep 15 00:00–03:00 Sep 17 20:00–23:00 Sep 18 20:00–24:00 Sep 19 00:00–02:00, 20:00–24:00 Sep 20 00:00–02:00, 21:00–24:00 Sep 21 00:00–04:00, 21:00–24:00 Sep 22 00:00–03:00 Sep 25 20:00–24:00 Sep 26 00:00–04:00, 20:00–24:00 Sep 27 00:00–02:00, 20:00–24:00 Sep 28 00:00–02:00, 20:00–23:00
October
Oct 1 20:00–24:00 Oct 2 00:00–04:00, 20:00–24:00 Oct 3 00:00–03:00, 19:00–24:00 Oct 4 00:00–03:00, 19:00–24:00 Oct 5 00:00–03:00 Oct 7 19:00–22:00 Oct 8 19:00–24:00 Oct 9 00:00–03:00, 20:00–24:00 Oct 10 00:00–04:00, 19:00–24:00 Oct 11 00:00–03:00 Oct 12 20:00–21:00 Oct 15 19:00–24:00 Oct 16 00:00–03:00, 20:00–24:00 Oct 17 20:00–24:00 Oct 18 00:00–02:00 Oct 21 20:00–24:00 Oct 22 00:00–03:00, 20:00–24:00 Oct 23 00:00–03:00, 20:00–24:00 Oct 24 00:00–03:00, 19:00–24:00 Oct 25 00:00–03:00, 19:00–24:00 Oct 26 00:00–03:00, 20:00–24:00 Oct 27 00:00–02:00 Oct 29 20:00–24:00 Oct 30 00:00–04:00, 20:00–24:00 Oct 31 00:00–04:00, 21:00–24:00
November
Nov 1 00:00–05:00, 20:00–24:00 Nov 2 00:00–04:00, 20:00–24:00 Nov 5 21:00–24:00 Nov 6 00:00–03:00, 21:00–24:00 Nov 7 20:00–24:00 Nov 8 00:00–03:00, 21:00–24:00 Nov 9 00:00–04:00, 21:00–24:00 Nov 10 00:00–04:00 Nov 12 21:00–24:00 Nov 13 00:00–02:00, 21:00–24:00 Nov 14 00:00–03:00, 21:00–24:00 Nov 15 00:00–03:00, 23:00–24:00 Nov 20 20:00–24:00 Nov 21 00:00–03:00, 21:00–24:00 Nov 22 00:00–04:00, 21:00–24:00 Nov 23 00:00–04:00, 20:00–24:00 Nov 24 00:00–03:00 Nov 26 21:00–24:00 Nov 27 00:00–04:00, 21:00–24:00 Nov 28 00:00–03:00, 20:00–24:00 Nov 29 00:00–04:00, 21:00–24:00 Nov 30 00:00–01:00, 21:00–24:00
December
Dec 1 00:00–04:00 Dec 3 21:00–24:00 Dec 4 00:00–03:00, 21:00–24:00 Dec 5 00:00–03:00, 21:00–24:00 Dec 6 00:00–02:00, 20:00–23:00 Dec 7 00:00–01:00 Dec 9 21:00–24:00 Dec 10 00:00–02:00, 20:00–24:00 Dec 11 00:00–02:00, 21:00–24:00 Dec 12 21:00–24:00 Dec 13 00:00–02:00, 20:00–24:00 Dec 14 00:00–03:00, 20:00–24:00 Dec 17 20:00–24:00 Dec 18 00:00–03:00, 20:00–24:00 Dec 19 00:00–04:00, 21:00–24:00 Dec 20 00:00–02:00 Dec 21 21:00–24:00 Dec 22 00:00–04:00, 21:00–24:00 Dec 23 00:00–04:00 Dec 28 21:00–24:00 Dec 29 00:00–02:00 Dec 30 21:00–24:00 Dec 31 00:00–03:00