Most often in March, 25 days.
Highest follower count seen that year: 5,300.
January
Jan 1 21:00–24:00 Jan 4 21:00–23:00 Jan 10 01:00–03:00 Jan 11 01:00–04:00 Jan 14 01:00–03:00, 21:00–23:00 Jan 16 00:00–02:00, 22:00–24:00 Jan 17 21:00–24:00 Jan 19 23:00–24:00 Jan 20 00:00–01:00 Jan 23 00:00–02:00 Jan 24 02:00–03:00 Jan 26 23:00–24:00 Jan 27 00:00–01:00 Jan 28 13:00–16:00 Jan 30 22:00–24:00 Jan 31 00:00–03:00
February
Feb 2 20:00–22:00 Feb 28 22:00–24:00
March
Mar 1 00:00–04:00 Mar 2 20:00–24:00 Mar 3 00:00–02:00, 20:00–24:00 Mar 4 00:00–01:00, 22:00–24:00 Mar 5 00:00–02:00, 20:00–24:00 Mar 6 01:00–06:00, 22:00–24:00 Mar 7 00:00–05:00, 23:00–24:00 Mar 8 00:00–05:00 Mar 9 21:00–24:00 Mar 10 00:00–04:00, 22:00–24:00 Mar 11 00:00–04:00 Mar 13 03:00–06:00 Mar 14 22:00–24:00 Mar 15 00:00–05:00 Mar 16 18:00–24:00 Mar 17 20:00–23:00 Mar 19 20:00–24:00 Mar 20 00:00–03:00, 21:00–24:00 Mar 21 00:00–04:00, 19:00–23:00 Mar 23 21:00–24:00 Mar 24 00:00–02:00, 21:00–24:00 Mar 25 00:00–04:00 Mar 28 03:00–09:00 Mar 29 02:00–04:00, 06:00–07:00 Mar 31 18:00–21:00
April
Apr 2 17:00–20:00 Apr 3 21:00–24:00 Apr 4 01:00–02:00 Apr 5 01:00–05:00 Apr 6 18:00–23:00 Apr 7 00:00–01:00, 22:00–24:00 Apr 8 00:00–01:00 Apr 12 03:00–08:00 Apr 13 19:00–24:00 Apr 14 00:00–03:00 Apr 15 00:00–03:00 Apr 17 00:00–05:00 Apr 18 22:00–24:00 Apr 19 00:00–01:00 Apr 20 22:00–24:00 Apr 21 00:00–01:00 Apr 22 01:00–05:00 Apr 24 01:00–06:00 Apr 27 18:00–19:00, 21:00–24:00 Apr 28 23:00–24:00 Apr 29 00:00–03:00, 21:00–24:00 Apr 30 00:00–01:00
May
May 2 22:00–24:00 May 3 00:00–02:00 May 4 20:00–22:00 May 6 23:00–24:00 May 7 00:00–04:00 May 10 23:00–24:00 May 11 00:00–03:00, 11:00–14:00, 20:00–23:00 May 14 19:00–24:00 May 15 00:00–01:00, 22:00–24:00 May 16 00:00–01:00 May 17 01:00–05:00 May 19 22:00–24:00 May 20 00:00–01:00 May 23 00:00–03:00 May 25 21:00–24:00 May 28 21:00–24:00 May 31 19:00–24:00
June
Jun 2 21:00–24:00 Jun 3 00:00–02:00 Jun 4 19:00–24:00 Jun 5 00:00–01:00 Jun 7 20:00–24:00 Jun 8 00:00–01:00, 22:00–24:00 Jun 9 00:00–02:00 Jun 11 21:00–24:00 Jun 12 00:00–01:00 Jun 13 21:00–24:00 Jun 14 00:00–01:00 Jun 15 20:00–24:00 Jun 18 19:00–24:00 Jun 19 00:00–01:00 Jun 20 00:00–02:00, 21:00–24:00 Jun 23 22:00–24:00 Jun 24 00:00–01:00 Jun 25 21:00–24:00 Jun 26 00:00–02:00 Jun 28 07:00–09:00 Jun 30 20:00–24:00
July
Jul 1 00:00–02:00 Jul 3 01:00–04:00 Jul 4 20:00–23:00 Jul 5 20:00–24:00 Jul 6 00:00–01:00 Jul 7 22:00–24:00 Jul 8 00:00–04:00, 22:00–24:00 Jul 9 00:00–03:00 Jul 10 22:00–24:00 Jul 11 00:00–03:00 Jul 13 20:00–24:00 Jul 14 00:00–02:00, 20:00–24:00 Jul 15 00:00–01:00 Jul 17 23:00–24:00 Jul 18 00:00–03:00, 20:00–24:00 Jul 20 21:00–24:00 Jul 26 23:00–24:00 Jul 27 00:00–04:00, 23:00–24:00 Jul 28 00:00–02:00, 23:00–24:00 Jul 29 00:00–02:00 Jul 30 21:00–24:00 Jul 31 00:00–03:00
August
Aug 1 22:00–24:00 Aug 2 00:00–02:00, 21:00–24:00 Aug 3 00:00–03:00, 21:00–23:00 Aug 6 23:00–24:00 Aug 7 00:00–03:00 Aug 11 20:00–24:00 Aug 13 19:00–24:00 Aug 14 00:00–03:00, 20:00–24:00 Aug 15 00:00–01:00, 19:00–24:00 Aug 16 00:00–01:00 Aug 17 20:00–24:00 Aug 18 00:00–01:00, 19:00–24:00 Aug 20 19:00–24:00 Aug 21 00:00–02:00 Aug 24 20:00–24:00 Aug 25 00:00–01:00 Aug 28 20:00–24:00 Aug 29 00:00–01:00, 21:00–24:00 Aug 31 20:00–24:00
September
Sep 1 00:00–01:00, 20:00–24:00 Sep 4 23:00–24:00 Sep 5 00:00–03:00, 20:00–24:00 Sep 6 00:00–02:00 Sep 8 21:00–24:00 Sep 9 00:00–02:00, 23:00–24:00 Sep 10 00:00–03:00, 19:00–23:00 Sep 11 19:00–23:00 Sep 14 20:00–24:00 Sep 16 02:00–07:00 Sep 17 21:00–24:00 Sep 18 00:00–03:00, 21:00–24:00 Sep 19 00:00–03:00 Sep 23 01:00–05:00 Sep 24 19:00–24:00 Sep 25 20:00–24:00 Sep 26 00:00–01:00, 19:00–24:00 Sep 27 00:00–01:00 Sep 28 20:00–24:00 Sep 29 00:00–02:00
October
Oct 2 20:00–24:00 Oct 3 00:00–01:00, 22:00–24:00 Oct 4 00:00–03:00 Oct 5 21:00–24:00 Oct 6 00:00–06:00, 21:00–24:00 Oct 7 00:00–01:00, 06:00–09:00 Oct 8 21:00–24:00 Oct 9 20:00–21:00 Oct 10 23:00–24:00 Oct 11 00:00–07:00 Oct 12 20:00–24:00 Oct 13 00:00–01:00, 21:00–24:00 Oct 14 00:00–02:00 Oct 15 22:00–24:00 Oct 16 00:00–03:00 Oct 17 21:00–24:00 Oct 18 00:00–01:00 Oct 19 21:00–24:00 Oct 20 20:00–24:00 Oct 22 22:00–24:00 Oct 23 00:00–03:00 Oct 28 14:00–19:00 Oct 29 16:00–18:00
November
Nov 1 23:00–24:00 Nov 2 00:00–03:00 Nov 4 02:00–06:00 Nov 5 23:00–24:00 Nov 6 00:00–02:00 Nov 7 22:00–24:00 Nov 8 00:00–03:00, 07:00–09:00 Nov 12 23:00–24:00 Nov 13 00:00–05:00, 22:00–24:00 Nov 14 00:00–03:00, 21:00–24:00 Nov 21 20:00–24:00 Nov 22 00:00–02:00 Nov 23 19:00–24:00 Nov 24 00:00–01:00 Nov 26 23:00–24:00 Nov 27 00:00–03:00 Nov 28 21:00–24:00 Nov 29 00:00–03:00
December
Dec 1 20:00–24:00 Dec 2 00:00–01:00 Dec 3 20:00–24:00 Dec 4 00:00–03:00 Dec 5 01:00–06:00, 22:00–24:00 Dec 6 00:00–01:00 Dec 8 23:00–24:00 Dec 9 00:00–04:00 Dec 11 23:00–24:00 Dec 12 00:00–02:00 Dec 14 23:00–24:00 Dec 15 00:00–03:00 Dec 17 19:00–22:00 Dec 21 20:00–24:00 Dec 23 21:00–24:00 Dec 25 22:00–24:00 Dec 26 00:00–02:00 Dec 28 21:00–24:00 Dec 29 00:00–01:00