Most often in October, 24 days.
Highest follower count seen that year: 3,320.
January
Jan 4 19:00–20:00, 22:00–23:00 Jan 5 00:00–06:00, 08:00–12:00 Jan 9 00:00–03:00, 22:00–23:00 Jan 10 03:00–05:00 Jan 12 00:00–08:00 Jan 13 23:00–24:00 Jan 14 00:00–02:00 Jan 18 02:00–13:00 Jan 19 21:00–23:00 Jan 21 01:00–04:00 Jan 26 06:00–10:00, 14:00–24:00 Jan 27 00:00–03:00 Jan 28 02:00–03:00 Jan 31 00:00–04:00, 23:00–24:00
February
Feb 1 00:00–03:00, 23:00–24:00 Feb 2 00:00–08:00, 15:00–16:00 Feb 4 02:00–05:00 Feb 5 13:00–15:00, 22:00–24:00 Feb 6 00:00–02:00, 19:00–20:00 Feb 7 23:00–24:00 Feb 8 00:00–02:00 Feb 11 00:00–04:00 Feb 12 23:00–24:00 Feb 13 00:00–01:00 Feb 14 01:00–05:00, 21:00–22:00 Feb 15 23:00–24:00 Feb 16 01:00–02:00, 04:00–06:00 Feb 18 01:00–05:00, 07:00–08:00, 23:00–24:00 Feb 19 00:00–01:00 Feb 20 14:00–18:00 Feb 21 00:00–01:00, 22:00–23:00 Feb 23 02:00–07:00, 12:00–15:00, 22:00–24:00 Feb 24 00:00–01:00 Feb 27 14:00–15:00
March
Mar 1 04:00–13:00, 21:00–24:00 Mar 3 05:00–09:00 Mar 4 04:00–10:00 Mar 5 00:00–01:00 Mar 7 01:00–04:00, 17:00–19:00, 21:00–23:00 Mar 8 01:00–02:00 Mar 11 01:00–02:00 Mar 12 04:00–14:00 Mar 15 01:00–02:00, 09:00–10:00 Mar 17 06:00–12:00 Mar 20 13:00–18:00 Mar 22 14:00–17:00, 23:00–24:00 Mar 23 00:00–07:00, 09:00–10:00, 12:00–15:00 Mar 24 03:00–06:00, 11:00–20:00 Mar 25 06:00–08:00 Mar 27 00:00–02:00, 04:00–11:00 Mar 29 04:00–10:00
April
Apr 1 06:00–13:00, 20:00–21:00 Apr 2 00:00–08:00 Apr 4 11:00–13:00 Apr 6 01:00–06:00 Apr 8 01:00–03:00, 05:00–06:00 Apr 9 09:00–11:00 Apr 10 02:00–03:00 Apr 11 13:00–14:00 Apr 12 09:00–14:00 Apr 14 03:00–07:00 Apr 16 03:00–07:00 Apr 22 02:00–05:00, 09:00–12:00 Apr 24 03:00–05:00, 07:00–09:00, 21:00–23:00 Apr 25 00:00–08:00, 14:00–15:00 Apr 28 23:00–24:00 Apr 29 00:00–06:00, 23:00–24:00 Apr 30 00:00–01:00
May
May 8 01:00–05:00, 17:00–19:00 May 9 13:00–17:00 May 10 02:00–04:00, 14:00–15:00 May 11 01:00–04:00 May 12 21:00–24:00 May 13 02:00–04:00, 23:00–24:00 May 14 00:00–04:00 May 16 19:00–20:00, 22:00–23:00 May 18 23:00–24:00 May 19 00:00–04:00, 21:00–23:00 May 20 00:00–01:00 May 22 23:00–24:00 May 23 01:00–03:00 May 24 05:00–13:00 May 25 20:00–24:00 May 26 00:00–04:00 May 29 22:00–24:00 May 30 01:00–04:00 May 31 00:00–06:00
June
Jun 2 21:00–24:00 Jun 3 00:00–03:00 Jun 7 00:00–01:00, 17:00–18:00 Jun 9 20:00–24:00 Jun 10 00:00–03:00 Jun 15 17:00–18:00, 23:00–24:00 Jun 16 02:00–03:00 Jun 17 20:00–24:00 Jun 18 00:00–01:00 Jun 20 00:00–04:00 Jun 22 23:00–24:00 Jun 24 00:00–04:00, 20:00–22:00 Jun 27 01:00–05:00 Jun 29 22:00–24:00 Jun 30 20:00–24:00
July
Jul 1 00:00–02:00 Jul 2 23:00–24:00 Jul 3 00:00–02:00, 22:00–23:00 Jul 5 23:00–24:00 Jul 6 23:00–24:00 Jul 7 00:00–01:00, 21:00–22:00 Jul 10 01:00–07:00 Jul 11 03:00–04:00 Jul 14 19:00–21:00 Jul 15 14:00–17:00 Jul 16 02:00–03:00, 22:00–23:00 Jul 17 02:00–04:00 Jul 19 01:00–04:00, 08:00–11:00 Jul 21 20:00–24:00 Jul 22 00:00–03:00, 22:00–24:00 Jul 23 00:00–01:00, 22:00–24:00 Jul 24 00:00–03:00, 21:00–24:00 Jul 25 02:00–03:00 Jul 27 23:00–24:00 Jul 29 22:00–23:00 Jul 31 22:00–24:00
August
Aug 1 01:00–03:00 Aug 2 00:00–06:00, 14:00–17:00 Aug 3 22:00–24:00 Aug 4 00:00–01:00, 21:00–24:00 Aug 5 21:00–24:00 Aug 6 00:00–04:00 Aug 7 22:00–24:00 Aug 8 00:00–03:00 Aug 9 09:00–13:00 Aug 12 17:00–18:00 Aug 14 18:00–20:00, 22:00–23:00 Aug 15 23:00–24:00 Aug 16 00:00–01:00, 21:00–24:00 Aug 17 03:00–05:00, 07:00–08:00 Aug 31 15:00–18:00
September
Sep 1 00:00–03:00 Sep 2 08:00–09:00 Sep 11 00:00–01:00 Sep 12 00:00–04:00 Sep 14 11:00–14:00 Sep 24 20:00–22:00 Sep 26 15:00–16:00, 22:00–23:00 Sep 27 21:00–24:00 Sep 28 01:00–05:00 Sep 29 19:00–20:00
October
Oct 1 16:00–24:00 Oct 2 22:00–24:00 Oct 3 00:00–01:00, 12:00–13:00 Oct 5 21:00–23:00 Oct 7 00:00–02:00 Oct 8 21:00–22:00 Oct 9 23:00–24:00 Oct 10 00:00–06:00, 20:00–24:00 Oct 11 01:00–04:00 Oct 13 21:00–24:00 Oct 14 00:00–03:00, 18:00–24:00 Oct 15 00:00–02:00, 23:00–24:00 Oct 16 00:00–04:00 Oct 19 19:00–21:00 Oct 20 00:00–03:00, 19:00–21:00 Oct 21 04:00–05:00, 22:00–24:00 Oct 22 02:00–04:00, 11:00–13:00 Oct 23 23:00–24:00 Oct 24 00:00–04:00, 23:00–24:00 Oct 25 01:00–02:00, 05:00–06:00 Oct 27 00:00–01:00, 22:00–23:00 Oct 28 00:00–01:00, 07:00–09:00 Oct 29 00:00–03:00 Oct 31 00:00–01:00
November
Nov 1 02:00–06:00 Nov 3 00:00–01:00 Nov 5 15:00–16:00 Nov 6 21:00–22:00 Nov 9 14:00–15:00 Nov 11 00:00–02:00, 22:00–23:00 Nov 12 05:00–06:00 Nov 13 01:00–03:00 Nov 15 00:00–05:00 Nov 18 00:00–04:00 Nov 19 03:00–09:00, 23:00–24:00 Nov 21 01:00–04:00 Nov 22 06:00–08:00 Nov 23 23:00–24:00 Nov 24 00:00–01:00, 03:00–04:00 Nov 26 00:00–02:00, 22:00–23:00 Nov 27 02:00–05:00 Nov 29 22:00–23:00 Nov 30 03:00–09:00
December
Dec 2 09:00–13:00 Dec 8 15:00–16:00 Dec 10 02:00–06:00 Dec 11 23:00–24:00 Dec 12 00:00–05:00 Dec 14 03:00–05:00 Dec 15 03:00–04:00, 07:00–08:00 Dec 18 01:00–03:00 Dec 20 00:00–01:00 Dec 23 22:00–24:00 Dec 24 22:00–23:00 Dec 26 01:00–03:00