Most often in December, 25 days.
Highest follower count seen that year: 7,914.
January
Jan 1 08:00–10:00, 20:00–22:00 Jan 2 19:00–21:00 Jan 3 20:00–21:00 Jan 4 06:00–08:00, 15:00–20:00 Jan 5 12:00–14:00 Jan 8 19:00–22:00 Jan 10 16:00–18:00 Jan 11 06:00–08:00, 14:00–15:00 Jan 12 06:00–11:00, 17:00–19:00 Jan 13 19:00–21:00 Jan 14 17:00–19:00 Jan 15 18:00–19:00 Jan 18 18:00–19:00 Jan 19 12:00–13:00, 16:00–19:00 Jan 21 19:00–20:00 Jan 22 19:00–21:00 Jan 23 18:00–20:00 Jan 24 19:00–21:00 Jan 25 06:00–09:00, 13:00–19:00 Jan 26 10:00–12:00, 15:00–16:00 Jan 28 19:00–21:00 Jan 29 19:00–21:00
February
Feb 1 17:00–18:00 Feb 2 12:00–14:00, 16:00–17:00 Feb 4 18:00–20:00 Feb 7 16:00–19:00 Feb 8 06:00–08:00, 15:00–17:00 Feb 9 10:00–12:00 Feb 11 15:00–17:00 Feb 12 17:00–18:00 Feb 15 14:00–15:00 Feb 16 06:00–09:00, 13:00–15:00, 18:00–19:00 Feb 19 19:00–20:00 Feb 22 12:00–13:00 Feb 24 16:00–17:00 Feb 27 15:00–17:00 Feb 28 19:00–20:00
March
Mar 1 05:00–06:00, 12:00–17:00 Mar 6 17:00–19:00 Mar 7 19:00–21:00 Mar 8 06:00–10:00, 13:00–15:00 Mar 9 06:00–09:00, 20:00–23:00 Mar 10 18:00–21:00 Mar 11 15:00–20:00 Mar 14 18:00–20:00 Mar 15 06:00–10:00, 15:00–18:00 Mar 16 08:00–09:00 Mar 19 18:00–19:00 Mar 20 16:00–17:00 Mar 25 16:00–17:00 Mar 26 18:00–20:00 Mar 27 16:00–18:00 Mar 28 17:00–19:00 Mar 29 05:00–08:00 Mar 30 06:00–12:00 Mar 31 15:00–17:00
April
Apr 1 19:00–22:00 Apr 2 16:00–18:00 Apr 3 15:00–19:00 Apr 4 16:00–19:00, 21:00–22:00 Apr 5 05:00–07:00, 19:00–20:00 Apr 6 07:00–08:00, 11:00–12:00 Apr 7 20:00–21:00 Apr 8 16:00–17:00, 19:00–21:00 Apr 10 18:00–19:00 Apr 12 21:00–22:00 Apr 13 05:00–07:00, 12:00–13:00, 17:00–19:00 Apr 17 16:00–18:00, 20:00–21:00 Apr 18 06:00–07:00 Apr 21 16:00–17:00 Apr 26 21:00–22:00 Apr 29 18:00–21:00 Apr 30 17:00–19:00
May
May 1 05:00–07:00, 12:00–13:00 May 2 17:00–19:00, 21:00–23:00 May 4 10:00–11:00 May 6 19:00–20:00 May 7 19:00–20:00 May 9 17:00–18:00 May 11 06:00–07:00 May 18 11:00–12:00, 18:00–19:00
June
Jun 1 09:00–11:00, 15:00–16:00 Jun 3 15:00–18:00 Jun 4 03:00–05:00 Jun 7 05:00–09:00 Jun 8 05:00–07:00 Jun 9 10:00–11:00 Jun 12 14:00–15:00 Jun 13 03:00–05:00, 15:00–16:00 Jun 15 05:00–06:00, 10:00–11:00 Jun 17 15:00–18:00 Jun 18 17:00–18:00 Jun 20 15:00–17:00 Jun 21 04:00–05:00, 09:00–15:00 Jun 22 05:00–06:00, 09:00–12:00 Jun 27 14:00–15:00 Jun 29 16:00–18:00 Jun 30 18:00–19:00
July
Jul 1 15:00–17:00 Jul 2 15:00–17:00 Jul 3 16:00–18:00 Jul 4 16:00–18:00 Jul 5 21:00–22:00 Jul 6 18:00–20:00 Jul 13 05:00–08:00, 18:00–19:00 Jul 14 16:00–17:00 Jul 15 18:00–19:00 Jul 19 18:00–19:00 Jul 20 13:00–14:00 Jul 21 19:00–21:00 Jul 23 15:00–17:00, 19:00–20:00 Jul 27 06:00–08:00, 13:00–14:00 Jul 29 08:00–09:00, 19:00–21:00 Jul 30 05:00–07:00, 10:00–12:00, 17:00–19:00 Jul 31 18:00–22:00
August
Aug 1 06:00–07:00 Aug 6 19:00–20:00 Aug 7 09:00–11:00, 14:00–16:00 Aug 8 18:00–19:00 Aug 16 19:00–20:00 Aug 17 19:00–20:00 Aug 22 17:00–19:00 Aug 23 15:00–17:00 Aug 26 15:00–17:00 Aug 27 15:00–16:00 Aug 31 08:00–11:00
September
Sep 2 16:00–17:00 Sep 6 05:00–08:00 Sep 7 15:00–17:00 Sep 11 19:00–21:00 Sep 12 20:00–21:00 Sep 13 06:00–08:00 Sep 14 06:00–08:00 Sep 15 18:00–20:00 Sep 16 17:00–20:00 Sep 17 18:00–19:00 Sep 18 18:00–20:00 Sep 19 15:00–17:00 Sep 20 06:00–08:00, 12:00–14:00, 17:00–18:00 Sep 22 18:00–20:00 Sep 28 08:00–10:00
October
Oct 3 16:00–17:00 Oct 5 09:00–12:00 Oct 8 18:00–19:00 Oct 10 18:00–19:00 Oct 11 18:00–19:00 Oct 12 04:00–05:00, 13:00–14:00, 17:00–18:00 Oct 16 15:00–18:00 Oct 17 16:00–18:00 Oct 19 09:00–11:00, 13:00–14:00 Oct 21 17:00–19:00 Oct 22 14:00–16:00 Oct 23 15:00–17:00 Oct 26 15:00–17:00, 20:00–21:00 Oct 27 17:00–18:00 Oct 29 19:00–20:00
November
Nov 1 14:00–16:00 Nov 2 08:00–09:00 Nov 3 19:00–20:00 Nov 4 17:00–18:00 Nov 8 06:00–07:00, 15:00–16:00 Nov 9 08:00–12:00, 17:00–18:00 Nov 10 17:00–19:00 Nov 11 19:00–20:00 Nov 12 15:00–17:00 Nov 13 07:00–10:00, 19:00–21:00 Nov 14 07:00–09:00 Nov 15 07:00–10:00, 20:00–21:00 Nov 16 08:00–10:00, 17:00–19:00 Nov 18 18:00–20:00 Nov 19 21:00–22:00 Nov 21 17:00–18:00, 20:00–22:00 Nov 22 07:00–08:00 Nov 23 06:00–08:00 Nov 25 17:00–18:00 Nov 26 16:00–21:00 Nov 27 16:00–17:00 Nov 28 16:00–17:00 Nov 29 00:00–02:00, 07:00–10:00 Nov 30 07:00–11:00, 19:00–21:00
December
Dec 1 20:00–22:00 Dec 2 16:00–18:00 Dec 3 17:00–22:00 Dec 4 19:00–20:00 Dec 5 19:00–20:00 Dec 6 06:00–07:00, 17:00–18:00 Dec 7 06:00–08:00, 19:00–20:00 Dec 8 18:00–20:00 Dec 9 15:00–20:00 Dec 10 17:00–20:00 Dec 11 17:00–19:00 Dec 12 20:00–22:00 Dec 13 06:00–07:00 Dec 14 07:00–08:00, 11:00–13:00, 16:00–18:00 Dec 15 16:00–20:00 Dec 16 17:00–18:00 Dec 17 19:00–20:00 Dec 20 16:00–17:00 Dec 22 06:00–09:00 Dec 23 12:00–14:00 Dec 24 06:00–08:00 Dec 25 09:00–10:00 Dec 26 07:00–09:00, 14:00–15:00 Dec 27 08:00–10:00, 15:00–17:00 Dec 29 21:00–22:00