Most often in January, 27 days.
Highest follower count seen that year: 1,817.
January
Jan 1 06:00–08:00 Jan 2 04:00–05:00 Jan 4 09:00–10:00 Jan 5 04:00–05:00 Jan 6 02:00–03:00, 06:00–07:00 Jan 7 04:00–05:00, 08:00–09:00 Jan 8 03:00–04:00 Jan 9 09:00–10:00 Jan 10 03:00–04:00, 09:00–10:00 Jan 11 13:00–14:00 Jan 12 04:00–05:00 Jan 13 05:00–06:00, 14:00–15:00 Jan 14 16:00–17:00 Jan 16 01:00–02:00, 07:00–08:00 Jan 17 04:00–07:00 Jan 18 07:00–09:00 Jan 19 05:00–06:00, 15:00–16:00 Jan 20 04:00–05:00, 10:00–11:00 Jan 22 04:00–05:00 Jan 23 04:00–05:00 Jan 24 05:00–07:00 Jan 25 04:00–05:00 Jan 26 03:00–05:00 Jan 27 04:00–05:00, 13:00–15:00 Jan 28 04:00–05:00, 13:00–14:00 Jan 29 03:00–05:00, 09:00–10:00 Jan 31 04:00–05:00
February
Feb 1 14:00–15:00 Feb 2 02:00–03:00 Feb 3 08:00–10:00, 13:00–15:00 Feb 4 05:00–07:00 Feb 8 03:00–05:00 Feb 9 03:00–05:00 Feb 10 04:00–06:00 Feb 11 04:00–06:00 Feb 13 15:00–16:00 Feb 14 05:00–06:00 Feb 15 03:00–05:00, 17:00–18:00 Feb 16 04:00–05:00, 17:00–18:00 Feb 17 04:00–05:00, 16:00–17:00 Feb 19 04:00–05:00, 14:00–15:00 Feb 20 06:00–08:00 Feb 21 07:00–08:00 Feb 23 04:00–05:00 Feb 24 07:00–09:00 Feb 25 07:00–08:00 Feb 27 08:00–09:00
March
Mar 1 04:00–06:00 Mar 2 07:00–08:00, 16:00–17:00 Mar 3 09:00–10:00 Mar 4 07:00–08:00, 15:00–16:00 Mar 5 07:00–08:00 Mar 6 07:00–08:00 Mar 7 03:00–04:00, 08:00–09:00 Mar 8 07:00–08:00 Mar 10 16:00–17:00 Mar 11 03:00–04:00, 07:00–08:00 Mar 13 03:00–04:00, 07:00–08:00 Mar 14 07:00–08:00 Mar 16 09:00–10:00 Mar 19 04:00–05:00 Mar 24 05:00–06:00 Mar 29 13:00–14:00 Mar 30 03:00–05:00 Mar 31 04:00–05:00
April
Apr 1 06:00–07:00 Apr 3 16:00–17:00 Apr 4 05:00–06:00, 08:00–09:00 Apr 5 04:00–05:00 Apr 7 15:00–16:00 Apr 8 07:00–08:00 Apr 10 04:00–05:00 Apr 12 04:00–06:00 Apr 13 04:00–05:00, 08:00–09:00 Apr 15 05:00–06:00 Apr 17 14:00–15:00 Apr 23 07:00–08:00 Apr 24 08:00–09:00 Apr 25 04:00–05:00 Apr 27 02:00–04:00 Apr 29 06:00–07:00 Apr 30 07:00–08:00
May
May 1 08:00–09:00 May 4 04:00–05:00 May 7 05:00–06:00 May 8 03:00–04:00 May 9 05:00–07:00 May 14 04:00–05:00 May 16 06:00–07:00 May 17 06:00–07:00, 14:00–15:00 May 18 04:00–05:00 May 19 03:00–05:00 May 20 04:00–05:00 May 21 08:00–09:00 May 23 04:00–05:00 May 25 13:00–14:00 May 28 04:00–05:00, 13:00–14:00 May 29 03:00–05:00 May 30 07:00–08:00 May 31 03:00–05:00
June
Jun 1 06:00–07:00 Jun 2 06:00–07:00 Jun 3 06:00–07:00 Jun 4 04:00–05:00, 07:00–08:00 Jun 7 08:00–09:00 Jun 8 03:00–04:00 Jun 9 04:00–06:00 Jun 10 04:00–05:00 Jun 11 03:00–04:00 Jun 13 06:00–07:00 Jun 14 06:00–07:00 Jun 15 06:00–08:00 Jun 16 05:00–06:00 Jun 17 04:00–05:00 Jun 18 05:00–07:00 Jun 20 05:00–06:00 Jun 22 06:00–08:00 Jun 23 05:00–06:00 Jun 24 10:00–11:00 Jun 25 04:00–05:00 Jun 26 04:00–05:00 Jun 29 05:00–06:00 Jun 30 05:00–06:00
July
Jul 1 04:00–06:00 Jul 2 03:00–05:00, 10:00–11:00 Jul 3 04:00–05:00 Jul 4 06:00–07:00 Jul 5 03:00–05:00, 08:00–09:00 Jul 6 05:00–06:00 Jul 7 04:00–05:00 Jul 9 03:00–04:00 Jul 10 03:00–04:00 Jul 11 02:00–03:00, 06:00–07:00 Jul 12 03:00–08:00 Jul 13 05:00–06:00 Jul 16 15:00–16:00 Jul 17 02:00–04:00 Jul 18 04:00–05:00 Jul 19 04:00–05:00 Jul 20 05:00–06:00 Jul 21 05:00–07:00 Jul 22 01:00–02:00, 09:00–10:00 Jul 23 05:00–06:00 Jul 24 02:00–04:00 Jul 26 05:00–06:00 Jul 27 05:00–06:00
August
Aug 1 14:00–16:00 Aug 3 09:00–10:00 Aug 5 16:00–17:00 Aug 6 06:00–07:00 Aug 7 05:00–06:00 Aug 8 12:00–13:00 Aug 9 07:00–08:00 Aug 10 07:00–08:00 Aug 11 15:00–16:00 Aug 12 07:00–08:00 Aug 13 13:00–14:00 Aug 14 11:00–12:00 Aug 15 07:00–08:00 Aug 16 08:00–09:00 Aug 18 04:00–05:00 Aug 19 04:00–05:00 Aug 21 11:00–12:00 Aug 23 07:00–08:00 Aug 24 05:00–06:00 Aug 27 06:00–07:00 Aug 29 04:00–05:00 Aug 30 05:00–06:00, 14:00–15:00
September
Sep 1 04:00–06:00 Sep 4 09:00–10:00 Sep 5 14:00–15:00 Sep 7 04:00–05:00, 13:00–14:00 Sep 8 07:00–09:00, 14:00–15:00 Sep 9 14:00–15:00 Sep 10 14:00–15:00 Sep 11 08:00–09:00 Sep 13 05:00–06:00 Sep 14 05:00–06:00 Sep 15 08:00–10:00 Sep 16 04:00–05:00 Sep 17 03:00–04:00 Sep 18 15:00–16:00 Sep 20 13:00–14:00 Sep 21 05:00–06:00 Sep 23 15:00–16:00 Sep 24 08:00–09:00 Sep 26 08:00–09:00 Sep 27 07:00–09:00 Sep 28 04:00–05:00
October
Oct 1 08:00–09:00 Oct 3 08:00–09:00 Oct 5 07:00–09:00 Oct 7 07:00–08:00 Oct 8 07:00–08:00 Oct 10 14:00–15:00 Oct 11 08:00–09:00 Oct 12 06:00–07:00 Oct 15 07:00–08:00 Oct 16 14:00–15:00 Oct 18 06:00–08:00 Oct 19 04:00–05:00 Oct 21 06:00–07:00 Oct 22 06:00–07:00 Oct 23 14:00–15:00 Oct 24 13:00–14:00 Oct 25 14:00–15:00 Oct 29 07:00–08:00 Oct 31 07:00–08:00
November
Nov 1 07:00–08:00 Nov 3 12:00–13:00 Nov 5 10:00–11:00 Nov 6 14:00–15:00 Nov 8 14:00–15:00 Nov 9 13:00–14:00 Nov 10 15:00–16:00 Nov 11 08:00–09:00, 13:00–14:00 Nov 12 13:00–14:00 Nov 13 08:00–09:00, 13:00–14:00 Nov 16 06:00–07:00 Nov 17 14:00–15:00 Nov 18 13:00–14:00 Nov 19 14:00–15:00 Nov 20 14:00–15:00 Nov 21 14:00–15:00 Nov 22 13:00–14:00 Nov 24 15:00–16:00 Nov 25 11:00–12:00 Nov 27 14:00–15:00 Nov 28 15:00–16:00 Nov 29 15:00–16:00 Nov 30 14:00–15:00
December
Dec 1 13:00–14:00 Dec 2 14:00–15:00 Dec 5 14:00–15:00 Dec 6 14:00–15:00 Dec 8 13:00–14:00 Dec 9 07:00–08:00 Dec 10 14:00–15:00 Dec 11 03:00–04:00, 14:00–15:00 Dec 12 14:00–15:00 Dec 13 15:00–16:00 Dec 14 07:00–08:00 Dec 15 05:00–06:00 Dec 16 14:00–15:00 Dec 17 14:00–15:00 Dec 18 14:00–15:00 Dec 19 14:00–15:00 Dec 20 14:00–15:00 Dec 21 15:00–16:00 Dec 23 09:00–10:00, 14:00–15:00 Dec 25 05:00–07:00, 14:00–15:00 Dec 26 14:00–15:00 Dec 29 14:00–15:00