Most often in January, 26 days.
Highest follower count seen that year: 32,000.
January
Jan 1 08:00–19:00 Jan 2 07:00–10:00, 15:00–18:00 Jan 3 07:00–13:00, 15:00–17:00 Jan 4 07:00–09:00, 15:00–17:00 Jan 5 05:00–10:00, 15:00–17:00 Jan 6 10:00–13:00, 17:00–18:00 Jan 7 07:00–09:00, 15:00–16:00 Jan 8 06:00–10:00, 15:00–17:00 Jan 9 05:00–07:00, 15:00–17:00 Jan 10 05:00–08:00, 16:00–18:00 Jan 11 06:00–09:00, 14:00–18:00 Jan 12 05:00–10:00, 16:00–17:00 Jan 13 05:00–11:00, 15:00–17:00 Jan 14 05:00–12:00, 16:00–18:00 Jan 20 05:00–11:00, 16:00–18:00 Jan 21 05:00–11:00, 15:00–16:00 Jan 22 05:00–07:00 Jan 23 05:00–10:00, 16:00–17:00 Jan 24 06:00–10:00, 16:00–17:00 Jan 25 06:00–09:00, 16:00–18:00 Jan 26 07:00–10:00 Jan 27 05:00–10:00, 15:00–18:00 Jan 28 05:00–10:00, 15:00–16:00 Jan 29 06:00–10:00, 16:00–20:00 Jan 30 08:00–11:00, 15:00–18:00 Jan 31 17:00–18:00
February
Feb 1 06:00–09:00, 16:00–17:00 Feb 2 06:00–10:00 Feb 3 07:00–12:00 Feb 4 06:00–12:00, 15:00–17:00 Feb 5 05:00–10:00, 15:00–20:00 Feb 6 07:00–09:00, 16:00–19:00 Feb 7 06:00–11:00, 16:00–18:00 Feb 8 06:00–10:00 Feb 15 07:00–09:00, 15:00–18:00 Feb 16 07:00–10:00, 13:00–15:00 Feb 17 05:00–10:00, 16:00–18:00 Feb 18 06:00–11:00, 15:00–19:00 Feb 19 06:00–13:00, 16:00–17:00 Feb 20 06:00–11:00, 16:00–18:00 Feb 21 05:00–07:00, 16:00–18:00 Feb 22 07:00–11:00, 13:00–17:00 Feb 23 07:00–10:00 Feb 24 05:00–11:00 Feb 25 06:00–11:00 Feb 26 06:00–11:00, 18:00–20:00 Feb 27 05:00–12:00 Feb 28 05:00–07:00, 16:00–18:00
March
Mar 1 05:00–09:00, 16:00–18:00 Mar 2 07:00–11:00, 16:00–18:00 Mar 3 05:00–11:00, 16:00–19:00 Mar 4 09:00–11:00, 15:00–18:00 Mar 5 06:00–10:00, 16:00–18:00 Mar 6 05:00–10:00, 15:00–17:00 Mar 7 05:00–08:00, 10:00–13:00, 16:00–18:00 Mar 8 06:00–09:00, 16:00–21:00 Mar 9 06:00–08:00 Mar 16 06:00–14:00 Mar 17 05:00–10:00, 16:00–18:00 Mar 18 05:00–11:00, 15:00–17:00 Mar 19 06:00–09:00 Mar 20 05:00–09:00, 15:00–19:00 Mar 21 07:00–13:00, 16:00–18:00 Mar 22 06:00–10:00, 15:00–17:00 Mar 23 05:00–09:00, 16:00–18:00 Mar 24 06:00–11:00, 16:00–19:00 Mar 25 05:00–11:00, 16:00–18:00 Mar 29 05:00–11:00, 15:00–19:00 Mar 30 05:00–10:00, 16:00–18:00 Mar 31 06:00–10:00, 15:00–18:00
April
Apr 1 06:00–11:00, 16:00–18:00 Apr 2 05:00–12:00, 16:00–18:00 Apr 3 05:00–10:00, 15:00–17:00 Apr 4 05:00–09:00 Apr 10 06:00–12:00, 16:00–18:00 Apr 11 05:00–09:00, 15:00–17:00 Apr 12 15:00–18:00 Apr 13 06:00–09:00, 16:00–18:00 Apr 14 05:00–09:00, 16:00–19:00 Apr 15 06:00–11:00, 17:00–18:00 Apr 16 06:00–09:00, 15:00–18:00 Apr 17 05:00–10:00, 16:00–18:00 Apr 18 05:00–09:00, 15:00–18:00 Apr 19 05:00–09:00, 17:00–18:00 Apr 21 05:00–10:00, 15:00–18:00 Apr 22 05:00–10:00, 16:00–17:00 Apr 23 05:00–10:00, 15:00–19:00 Apr 24 06:00–12:00, 16:00–18:00 Apr 25 05:00–08:00, 17:00–19:00 Apr 26 05:00–08:00, 15:00–18:00 Apr 27 06:00–09:00 Apr 28 08:00–12:00 Apr 29 05:00–09:00, 15:00–17:00 Apr 30 06:00–08:00
May
May 1 13:00–19:00 May 2 05:00–07:00, 09:00–10:00, 17:00–20:00 May 9 07:00–17:00 May 10 06:00–10:00, 15:00–18:00 May 11 07:00–10:00, 13:00–15:00 May 12 07:00–11:00, 15:00–17:00 May 13 05:00–07:00 May 14 07:00–10:00, 13:00–16:00 May 15 08:00–09:00, 20:00–21:00 May 16 06:00–09:00, 16:00–21:00 May 17 06:00–09:00, 15:00–19:00 May 18 05:00–10:00, 16:00–18:00 May 19 12:00–14:00, 16:00–21:00 May 20 05:00–10:00, 15:00–18:00 May 21 08:00–12:00, 15:00–18:00 May 22 05:00–09:00 May 23 07:00–11:00, 15:00–17:00 May 24 05:00–13:00, 15:00–16:00 May 25 06:00–10:00, 16:00–17:00 May 26 06:00–11:00, 16:00–19:00 May 27 05:00–09:00, 15:00–17:00
June
Jun 2 05:00–11:00, 16:00–18:00 Jun 3 10:00–13:00, 18:00–20:00 Jun 4 05:00–09:00, 12:00–17:00 Jun 5 11:00–13:00, 16:00–18:00 Jun 6 06:00–12:00, 16:00–18:00 Jun 7 05:00–09:00, 15:00–18:00 Jun 8 06:00–10:00, 16:00–17:00 Jun 9 07:00–11:00, 15:00–18:00 Jun 12 06:00–12:00, 14:00–16:00 Jun 13 07:00–11:00, 15:00–18:00 Jun 14 06:00–11:00, 16:00–18:00 Jun 15 05:00–10:00, 14:00–16:00 Jun 17 04:00–11:00, 15:00–17:00 Jun 18 05:00–11:00, 15:00–17:00 Jun 19 05:00–10:00, 15:00–17:00 Jun 20 05:00–09:00 Jun 21 05:00–10:00, 15:00–17:00 Jun 22 06:00–10:00, 16:00–18:00 Jun 23 07:00–08:00
July
Jul 2 06:00–10:00, 15:00–19:00 Jul 3 06:00–10:00, 15:00–17:00 Jul 4 05:00–09:00, 15:00–19:00 Jul 5 06:00–11:00, 15:00–17:00 Jul 6 06:00–09:00, 15:00–17:00 Jul 7 05:00–10:00, 15:00–17:00 Jul 8 06:00–10:00, 16:00–18:00 Jul 9 06:00–10:00, 16:00–17:00 Jul 10 07:00–13:00 Jul 11 05:00–13:00, 17:00–18:00 Jul 12 05:00–10:00, 15:00–17:00 Jul 13 05:00–08:00, 15:00–17:00 Jul 14 05:00–10:00, 14:00–15:00 Jul 15 07:00–09:00
August
Aug 2 15:00–20:00 Aug 3 06:00–10:00, 17:00–19:00 Aug 4 06:00–11:00, 16:00–18:00 Aug 5 08:00–12:00, 17:00–20:00 Aug 6 05:00–09:00, 15:00–19:00 Aug 7 08:00–11:00, 18:00–20:00 Aug 8 07:00–10:00, 16:00–19:00 Aug 9 05:00–11:00, 17:00–19:00 Aug 10 06:00–10:00, 16:00–19:00 Aug 11 06:00–11:00, 16:00–18:00 Aug 12 08:00–11:00, 16:00–19:00 Aug 13 04:00–07:00, 09:00–11:00, 15:00–17:00 Aug 14 06:00–09:00, 16:00–18:00 Aug 15 06:00–10:00, 15:00–17:00 Aug 16 05:00–13:00, 15:00–17:00 Aug 26 15:00–18:00 Aug 27 09:00–12:00, 15:00–19:00 Aug 28 06:00–11:00, 16:00–18:00 Aug 29 13:00–18:00 Aug 30 06:00–10:00, 15:00–17:00 Aug 31 05:00–09:00
September
Sep 1 15:00–21:00 Sep 2 06:00–10:00 Sep 3 05:00–10:00, 15:00–17:00 Sep 4 05:00–07:00, 15:00–18:00 Sep 5 06:00–09:00 Sep 6 05:00–09:00, 16:00–18:00 Sep 7 05:00–09:00, 14:00–16:00 Sep 9 06:00–09:00, 15:00–17:00 Sep 10 05:00–10:00, 16:00–17:00 Sep 11 05:00–07:00, 15:00–19:00 Sep 12 05:00–09:00, 13:00–15:00, 18:00–20:00 Sep 13 05:00–07:00 Sep 19 06:00–09:00, 13:00–19:00 Sep 20 07:00–13:00, 16:00–18:00 Sep 21 06:00–09:00, 15:00–18:00 Sep 22 05:00–08:00, 16:00–19:00 Sep 23 05:00–10:00, 16:00–19:00 Sep 24 05:00–07:00, 15:00–18:00 Sep 25 05:00–10:00, 15:00–18:00 Sep 26 06:00–09:00, 18:00–20:00 Sep 27 07:00–10:00, 15:00–21:00 Sep 28 05:00–10:00 Sep 29 07:00–10:00, 17:00–19:00 Sep 30 15:00–19:00
October
Oct 1 06:00–11:00, 16:00–17:00 Oct 2 12:00–18:00 Oct 3 13:00–19:00 Oct 4 04:00–11:00, 16:00–18:00 Oct 5 05:00–12:00 Oct 6 06:00–10:00 Oct 7 05:00–09:00, 13:00–17:00 Oct 8 05:00–10:00 Oct 9 05:00–10:00 Oct 10 06:00–11:00 Oct 18 06:00–12:00, 15:00–17:00 Oct 19 06:00–10:00, 15:00–18:00 Oct 20 05:00–09:00, 14:00–17:00 Oct 21 05:00–07:00, 16:00–19:00 Oct 22 06:00–12:00, 16:00–18:00 Oct 23 07:00–11:00, 15:00–18:00 Oct 24 05:00–12:00, 16:00–18:00 Oct 25 06:00–11:00, 15:00–18:00 Oct 26 07:00–09:00, 15:00–18:00 Oct 27 06:00–10:00, 15:00–19:00 Oct 28 06:00–09:00, 16:00–18:00 Oct 29 06:00–10:00, 15:00–17:00 Oct 30 05:00–09:00, 15:00–17:00 Oct 31 08:00–11:00, 16:00–18:00
November
Nov 1 05:00–10:00, 14:00–17:00 Nov 4 05:00–10:00, 15:00–18:00 Nov 10 05:00–10:00, 15:00–18:00 Nov 11 05:00–09:00, 15:00–17:00 Nov 12 05:00–10:00, 16:00–17:00 Nov 13 06:00–10:00, 16:00–18:00 Nov 14 06:00–09:00, 14:00–18:00 Nov 15 07:00–11:00, 15:00–19:00 Nov 16 06:00–10:00, 14:00–17:00 Nov 17 05:00–09:00, 15:00–19:00 Nov 18 05:00–10:00, 16:00–18:00 Nov 19 06:00–10:00, 18:00–21:00 Nov 20 05:00–10:00, 16:00–19:00 Nov 21 06:00–09:00, 14:00–18:00 Nov 22 05:00–09:00, 15:00–18:00 Nov 23 07:00–10:00 Nov 24 05:00–10:00, 16:00–18:00 Nov 25 05:00–07:00, 15:00–19:00 Nov 26 05:00–11:00 Nov 27 05:00–10:00, 15:00–17:00, 20:00–22:00 Nov 28 06:00–09:00, 14:00–21:00 Nov 29 06:00–09:00
December
Dec 8 06:00–10:00, 16:00–18:00 Dec 9 06:00–10:00, 15:00–18:00 Dec 10 16:00–18:00 Dec 11 05:00–09:00, 13:00–19:00 Dec 12 06:00–12:00 Dec 13 06:00–09:00, 12:00–20:00 Dec 14 06:00–10:00, 15:00–17:00 Dec 15 05:00–06:00, 08:00–10:00 Dec 16 06:00–10:00, 16:00–18:00 Dec 17 09:00–11:00, 17:00–20:00 Dec 18 05:00–10:00, 17:00–19:00 Dec 19 06:00–10:00, 15:00–18:00 Dec 20 05:00–12:00, 16:00–19:00 Dec 21 05:00–10:00, 14:00–17:00 Dec 22 05:00–14:00, 17:00–20:00 Dec 23 07:00–10:00, 14:00–16:00 Dec 24 07:00–09:00, 16:00–19:00 Dec 25 05:00–10:00, 13:00–16:00