Most often in March, 25 days.
Highest follower count seen that year: 2,225.
January
Jan 3 06:00–18:00 Jan 4 13:00–20:00 Jan 5 15:00–22:00 Jan 8 13:00–18:00 Jan 10 15:00–24:00 Jan 13 06:00–15:00 Jan 15 00:00–07:00, 09:00–14:00 Jan 17 05:00–07:00, 15:00–20:00 Jan 19 07:00–12:00, 15:00–20:00 Jan 20 16:00–21:00 Jan 22 16:00–20:00, 22:00–24:00 Jan 23 00:00–01:00, 16:00–20:00 Jan 26 05:00–11:00 Jan 29 05:00–14:00 Jan 30 08:00–17:00 Jan 31 17:00–23:00
February
Feb 2 12:00–20:00 Feb 4 14:00–22:00 Feb 5 00:00–03:00, 17:00–24:00 Feb 6 00:00–03:00 Feb 7 08:00–24:00 Feb 8 00:00–01:00, 17:00–24:00 Feb 10 12:00–24:00 Feb 11 00:00–01:00, 16:00–24:00 Feb 12 00:00–02:00, 20:00–24:00 Feb 13 00:00–04:00, 11:00–19:00 Feb 16 18:00–24:00 Feb 17 00:00–03:00 Feb 18 03:00–11:00 Feb 19 00:00–10:00, 23:00–24:00 Feb 20 00:00–08:00 Feb 21 02:00–12:00 Feb 22 02:00–09:00 Feb 23 15:00–21:00 Feb 24 01:00–07:00 Feb 25 13:00–19:00, 22:00–24:00 Feb 26 14:00–20:00 Feb 27 02:00–06:00, 20:00–24:00 Feb 28 00:00–02:00, 07:00–12:00
March
Mar 1 12:00–19:00, 22:00–24:00 Mar 2 00:00–03:00, 16:00–20:00, 22:00–24:00 Mar 3 00:00–01:00, 15:00–21:00 Mar 4 15:00–24:00 Mar 6 16:00–24:00 Mar 7 17:00–24:00 Mar 8 00:00–01:00, 19:00–24:00 Mar 9 00:00–02:00, 19:00–24:00 Mar 10 00:00–05:00 Mar 12 17:00–24:00 Mar 13 03:00–04:00, 19:00–24:00 Mar 14 00:00–02:00, 20:00–24:00 Mar 15 00:00–05:00, 20:00–24:00 Mar 16 00:00–02:00 Mar 18 20:00–24:00 Mar 19 00:00–05:00, 23:00–24:00 Mar 20 00:00–07:00 Mar 21 01:00–08:00, 11:00–13:00 Mar 22 22:00–23:00 Mar 23 00:00–05:00 Mar 24 15:00–20:00 Mar 25 01:00–04:00 Mar 26 05:00–15:00 Mar 27 14:00–20:00 Mar 29 15:00–23:00
April
Apr 2 14:00–24:00 Apr 3 18:00–24:00 Apr 4 00:00–01:00 Apr 5 08:00–16:00 Apr 6 12:00–15:00 Apr 7 01:00–02:00 Apr 8 16:00–21:00 Apr 9 00:00–03:00, 22:00–24:00 Apr 10 00:00–04:00, 23:00–24:00 Apr 11 00:00–05:00 Apr 12 09:00–15:00, 22:00–24:00 Apr 13 00:00–02:00, 04:00–06:00 Apr 14 07:00–15:00 Apr 15 23:00–24:00 Apr 16 00:00–08:00 Apr 17 23:00–24:00 Apr 18 00:00–06:00 Apr 21 01:00–03:00, 05:00–08:00, 11:00–12:00 Apr 23 01:00–11:00 Apr 24 06:00–10:00 Apr 25 06:00–13:00 Apr 26 00:00–01:00, 03:00–09:00 Apr 27 16:00–19:00, 22:00–24:00 Apr 28 00:00–01:00 Apr 30 23:00–24:00
May
May 1 00:00–10:00 May 2 00:00–06:00, 08:00–10:00 May 3 10:00–17:00, 21:00–23:00 May 5 16:00–21:00 May 7 09:00–19:00 May 9 08:00–18:00 May 10 23:00–24:00 May 11 00:00–09:00 May 15 20:00–24:00 May 17 10:00–21:00 May 19 09:00–20:00 May 21 09:00–21:00 May 22 19:00–24:00 May 23 00:00–03:00, 22:00–24:00 May 24 00:00–05:00, 23:00–24:00 May 25 00:00–06:00, 22:00–24:00 May 26 00:00–05:00 May 27 23:00–24:00 May 28 00:00–05:00 May 29 01:00–03:00 May 30 01:00–06:00 May 31 03:00–08:00
June
Jun 9 03:00–08:00 Jun 11 06:00–09:00, 11:00–14:00 Jun 13 04:00–11:00 Jun 14 05:00–08:00, 11:00–12:00 Jun 15 05:00–12:00 Jun 18 09:00–15:00 Jun 19 05:00–10:00 Jun 23 04:00–10:00
July
Jul 2 14:00–21:00 Jul 3 15:00–22:00 Jul 4 16:00–23:00 Jul 5 19:00–23:00 Jul 6 00:00–04:00 Jul 7 10:00–19:00 Jul 9 12:00–21:00 Jul 10 17:00–24:00 Jul 12 17:00–24:00 Jul 13 16:00–23:00 Jul 16 23:00–24:00 Jul 17 02:00–05:00, 22:00–24:00 Jul 18 00:00–05:00 Jul 19 21:00–24:00 Jul 20 00:00–05:00, 22:00–24:00 Jul 21 00:00–06:00 Jul 23 14:00–18:00, 21:00–24:00 Jul 24 00:00–01:00 Jul 25 09:00–17:00, 23:00–24:00 Jul 26 00:00–03:00
August
Aug 1 11:00–20:00 Aug 2 16:00–24:00 Aug 3 00:00–01:00 Aug 4 10:00–19:00 Aug 6 16:00–22:00 Aug 7 15:00–23:00 Aug 8 16:00–24:00 Aug 10 16:00–24:00 Aug 12 17:00–24:00 Aug 13 17:00–24:00 Aug 14 16:00–22:00 Aug 19 21:00–24:00 Aug 20 00:00–03:00, 22:00–24:00 Aug 21 00:00–05:00 Aug 22 05:00–10:00 Aug 24 07:00–13:00 Aug 27 10:00–15:00 Aug 29 07:00–10:00 Aug 31 14:00–17:00, 22:00–24:00
September
Sep 1 00:00–02:00 Sep 2 13:00–18:00, 22:00–24:00 Sep 4 15:00–19:00 Sep 5 11:00–16:00 Sep 7 14:00–21:00 Sep 9 14:00–19:00 Sep 10 12:00–19:00 Sep 11 13:00–21:00 Sep 13 14:00–21:00 Sep 14 14:00–20:00 Sep 17 12:00–19:00 Sep 19 12:00–20:00 Sep 22 10:00–19:00 Sep 23 21:00–24:00 Sep 24 00:00–02:00 Sep 25 15:00–21:00 Sep 27 13:00–22:00 Sep 29 19:00–24:00 Sep 30 20:00–24:00
October
Oct 1 00:00–03:00 Oct 5 18:00–22:00 Oct 6 18:00–24:00 Oct 7 00:00–01:00, 18:00–23:00 Oct 8 20:00–24:00 Oct 9 00:00–01:00, 22:00–23:00 Oct 10 00:00–03:00, 22:00–24:00 Oct 11 00:00–04:00, 20:00–24:00 Oct 15 23:00–24:00 Oct 16 00:00–04:00 Oct 17 06:00–12:00 Oct 18 16:00–18:00 Oct 19 01:00–04:00 Oct 24 11:00–18:00 Oct 27 14:00–21:00 Oct 31 12:00–20:00
November
Nov 3 10:00–19:00 Nov 4 17:00–24:00 Nov 6 16:00–23:00 Nov 9 17:00–23:00 Nov 11 14:00–21:00 Nov 16 13:00–22:00 Nov 19 13:00–21:00 Nov 20 17:00–23:00 Nov 21 18:00–21:00 Nov 22 18:00–23:00 Nov 23 17:00–24:00 Nov 26 12:00–16:00 Nov 29 15:00–21:00
December
Dec 3 18:00–24:00 Dec 5 14:00–24:00 Dec 6 21:00–24:00 Dec 7 00:00–06:00 Dec 9 14:00–20:00 Dec 11 16:00–24:00 Dec 12 00:00–01:00, 21:00–24:00 Dec 13 00:00–03:00 Dec 31 01:00–05:00, 13:00–15:00