Most often in March, 28 days.
Highest follower count seen that year: 2,327.
January
Jan 1 09:00–10:00 Jan 3 05:00–12:00 Jan 4 06:00–09:00 Jan 5 05:00–06:00, 10:00–11:00 Jan 6 08:00–13:00 Jan 7 08:00–11:00 Jan 8 06:00–11:00 Jan 9 06:00–13:00 Jan 10 06:00–10:00 Jan 11 03:00–09:00 Jan 12 06:00–10:00, 14:00–15:00 Jan 14 04:00–08:00 Jan 15 03:00–07:00 Jan 16 07:00–10:00 Jan 17 07:00–11:00 Jan 18 09:00–13:00 Jan 19 04:00–05:00, 09:00–10:00 Jan 20 03:00–07:00 Jan 23 06:00–09:00 Jan 25 05:00–10:00 Jan 26 07:00–08:00 Jan 27 07:00–11:00 Jan 28 00:00–03:00, 08:00–11:00 Jan 29 06:00–08:00 Jan 30 09:00–10:00 Jan 31 07:00–10:00
February
Feb 1 05:00–09:00 Feb 2 07:00–08:00 Feb 4 05:00–09:00 Feb 5 05:00–09:00 Feb 6 07:00–09:00 Feb 7 07:00–09:00 Feb 8 08:00–11:00 Feb 9 08:00–09:00 Feb 10 06:00–09:00 Feb 11 05:00–10:00 Feb 12 02:00–08:00 Feb 13 04:00–08:00 Feb 14 06:00–09:00 Feb 15 04:00–08:00 Feb 18 01:00–10:00 Feb 19 05:00–08:00 Feb 20 05:00–09:00 Feb 21 06:00–10:00 Feb 22 08:00–11:00 Feb 23 04:00–09:00 Feb 24 04:00–07:00 Feb 25 05:00–10:00 Feb 26 04:00–09:00 Feb 27 04:00–09:00 Feb 28 04:00–07:00
March
Mar 1 05:00–09:00 Mar 2 07:00–09:00 Mar 3 06:00–09:00 Mar 4 05:00–08:00 Mar 5 06:00–09:00 Mar 6 09:00–11:00 Mar 7 05:00–08:00 Mar 8 05:00–10:00 Mar 9 03:00–07:00 Mar 10 05:00–10:00 Mar 11 09:00–10:00 Mar 12 06:00–11:00 Mar 13 06:00–08:00 Mar 14 06:00–09:00 Mar 15 05:00–07:00 Mar 16 06:00–08:00 Mar 17 06:00–09:00 Mar 18 08:00–09:00 Mar 19 05:00–07:00 Mar 20 06:00–08:00 Mar 21 07:00–08:00 Mar 22 06:00–08:00 Mar 23 08:00–09:00 Mar 24 07:00–09:00 Mar 25 06:00–10:00 Mar 28 09:00–10:00 Mar 29 07:00–09:00 Mar 31 07:00–09:00
April
Apr 1 07:00–08:00 Apr 3 05:00–07:00 Apr 4 07:00–09:00 Apr 5 07:00–09:00 Apr 6 09:00–10:00 Apr 9 07:00–09:00 Apr 10 09:00–10:00 Apr 12 09:00–11:00 Apr 14 07:00–09:00 Apr 15 06:00–08:00 Apr 16 05:00–09:00 Apr 18 06:00–09:00 Apr 20 08:00–09:00 Apr 24 04:00–07:00 Apr 25 06:00–07:00 Apr 26 06:00–07:00 Apr 27 07:00–09:00 Apr 29 05:00–07:00 Apr 30 10:00–11:00
May
May 3 05:00–10:00 May 5 07:00–12:00 May 6 07:00–08:00 May 7 08:00–10:00 May 8 09:00–10:00 May 10 06:00–09:00 May 11 05:00–08:00 May 14 01:00–07:00 May 15 08:00–10:00 May 16 03:00–09:00 May 17 05:00–10:00 May 18 01:00–07:00 May 19 04:00–07:00 May 20 06:00–07:00 May 22 08:00–09:00 May 24 05:00–09:00 May 26 03:00–04:00, 08:00–09:00 May 27 04:00–05:00 May 28 08:00–10:00 May 29 07:00–08:00 May 30 07:00–11:00 May 31 06:00–09:00
June
Jun 1 08:00–11:00 Jun 2 04:00–06:00, 22:00–24:00 Jun 3 00:00–01:00, 03:00–05:00 Jun 4 05:00–06:00 Jun 6 07:00–08:00 Jun 7 03:00–04:00 Jun 8 07:00–08:00 Jun 11 06:00–07:00, 11:00–12:00 Jun 12 12:00–13:00 Jun 13 02:00–05:00 Jun 18 05:00–06:00 Jun 19 03:00–05:00 Jun 23 04:00–06:00 Jun 25 04:00–07:00 Jun 27 04:00–05:00 Jun 28 06:00–07:00
July
Jul 3 03:00–04:00, 06:00–07:00 Jul 4 04:00–07:00 Jul 5 05:00–06:00 Jul 6 21:00–22:00 Jul 8 05:00–06:00 Jul 10 03:00–04:00 Jul 14 08:00–09:00 Jul 15 06:00–07:00, 10:00–11:00 Jul 17 10:00–11:00 Jul 18 03:00–08:00 Jul 19 09:00–11:00 Jul 20 04:00–05:00 Jul 21 03:00–04:00 Jul 22 01:00–04:00, 07:00–08:00 Jul 23 04:00–09:00 Jul 24 01:00–03:00, 06:00–13:00 Jul 25 02:00–06:00 Jul 26 03:00–08:00 Jul 27 02:00–09:00, 11:00–13:00 Jul 28 02:00–03:00 Jul 29 03:00–08:00 Jul 30 02:00–07:00 Jul 31 04:00–08:00, 10:00–13:00
August
Aug 1 05:00–11:00 Aug 2 06:00–08:00, 11:00–14:00 Aug 3 05:00–12:00 Aug 4 03:00–05:00 Aug 5 07:00–09:00 Aug 6 04:00–07:00 Aug 7 05:00–10:00 Aug 8 02:00–03:00 Aug 9 04:00–07:00, 11:00–12:00 Aug 10 05:00–08:00 Aug 11 05:00–13:00, 15:00–16:00 Aug 12 03:00–05:00 Aug 13 03:00–08:00 Aug 15 03:00–07:00 Aug 16 02:00–04:00 Aug 17 04:00–10:00 Aug 18 03:00–08:00 Aug 19 05:00–07:00 Aug 20 06:00–08:00 Aug 21 06:00–07:00 Aug 23 04:00–07:00 Aug 24 07:00–13:00, 16:00–17:00 Aug 25 08:00–10:00 Aug 26 08:00–10:00 Aug 29 04:00–10:00
September
Sep 1 07:00–08:00 Sep 3 07:00–13:00 Sep 5 07:00–08:00 Sep 7 09:00–13:00 Sep 9 06:00–08:00 Sep 10 06:00–10:00 Sep 13 06:00–09:00, 12:00–13:00 Sep 14 03:00–06:00 Sep 15 03:00–06:00, 08:00–11:00 Sep 16 04:00–06:00 Sep 19 04:00–07:00 Sep 20 05:00–08:00 Sep 22 05:00–08:00 Sep 23 10:00–11:00 Sep 24 03:00–06:00, 10:00–11:00 Sep 27 07:00–08:00 Sep 28 06:00–08:00, 10:00–11:00
October
Oct 1 11:00–12:00 Oct 3 06:00–07:00 Oct 4 06:00–07:00 Oct 5 05:00–08:00 Oct 6 04:00–10:00, 12:00–13:00 Oct 7 07:00–09:00 Oct 8 03:00–06:00 Oct 9 05:00–07:00, 09:00–14:00 Oct 10 06:00–07:00 Oct 11 05:00–08:00 Oct 12 05:00–07:00, 09:00–10:00 Oct 14 04:00–08:00 Oct 15 06:00–08:00, 12:00–13:00 Oct 17 07:00–09:00 Oct 18 04:00–08:00 Oct 20 06:00–11:00 Oct 22 05:00–09:00 Oct 23 06:00–08:00 Oct 24 06:00–09:00 Oct 25 06:00–07:00 Oct 26 04:00–08:00 Oct 27 05:00–10:00 Oct 29 04:00–05:00 Oct 30 03:00–06:00, 08:00–09:00 Oct 31 04:00–07:00
November
Nov 1 05:00–12:00 Nov 3 08:00–09:00 Nov 4 05:00–07:00, 11:00–14:00 Nov 5 06:00–07:00 Nov 6 04:00–10:00 Nov 7 05:00–08:00, 10:00–11:00 Nov 8 07:00–10:00, 12:00–17:00 Nov 9 07:00–09:00 Nov 10 07:00–11:00 Nov 12 05:00–06:00 Nov 13 02:00–07:00, 10:00–15:00 Nov 14 02:00–04:00, 07:00–11:00 Nov 15 10:00–12:00 Nov 18 07:00–09:00 Nov 19 03:00–05:00 Nov 20 04:00–05:00 Nov 21 02:00–08:00 Nov 27 03:00–05:00, 07:00–09:00, 14:00–17:00 Nov 29 04:00–05:00
December
Dec 2 00:00–03:00 Dec 3 03:00–08:00, 11:00–12:00, 15:00–19:00 Dec 4 02:00–08:00 Dec 6 06:00–12:00 Dec 10 03:00–04:00 Dec 11 03:00–04:00 Dec 13 05:00–08:00 Dec 14 06:00–07:00 Dec 16 03:00–04:00 Dec 17 06:00–10:00 Dec 20 09:00–13:00 Dec 23 06:00–07:00 Dec 24 04:00–08:00 Dec 28 09:00–11:00