Most often in July, 28 days.
Highest follower count seen that year: 30,253.
January
Jan 1 05:00–13:00 Jan 2 05:00–10:00 Jan 3 04:00–08:00 Jan 4 05:00–10:00 Jan 5 05:00–10:00 Jan 6 05:00–10:00 Jan 7 04:00–10:00 Jan 9 05:00–10:00 Jan 10 05:00–11:00 Jan 11 05:00–10:00 Jan 12 05:00–10:00 Jan 13 05:00–11:00 Jan 14 04:00–10:00 Jan 16 04:00–10:00 Jan 17 05:00–10:00 Jan 18 04:00–10:00 Jan 19 04:00–10:00 Jan 20 05:00–10:00 Jan 21 05:00–11:00 Jan 23 04:00–10:00 Jan 24 04:00–09:00 Jan 25 04:00–10:00 Jan 26 04:00–10:00 Jan 27 05:00–10:00 Jan 28 04:00–11:00 Jan 30 05:00–10:00 Jan 31 04:00–09:00
February
Feb 1 05:00–10:00 Feb 2 05:00–10:00 Feb 3 05:00–10:00 Feb 4 05:00–10:00 Feb 6 04:00–10:00 Feb 7 04:00–10:00 Feb 8 05:00–11:00 Feb 9 04:00–10:00 Feb 10 05:00–10:00 Feb 11 05:00–10:00 Feb 13 04:00–10:00 Feb 14 05:00–10:00 Feb 15 04:00–10:00 Feb 16 05:00–10:00 Feb 17 04:00–10:00 Feb 19 05:00–10:00 Feb 20 05:00–10:00 Feb 21 05:00–10:00 Feb 22 05:00–11:00 Feb 23 04:00–10:00 Feb 24 04:00–10:00 Feb 26 04:00–10:00 Feb 27 05:00–10:00 Feb 28 05:00–10:00
March
Mar 1 04:00–10:00 Mar 2 05:00–10:00 Mar 3 04:00–10:00 Mar 4 04:00–10:00 Mar 5 06:00–10:00 Mar 7 05:00–10:00 Mar 8 04:00–10:00 Mar 9 05:00–11:00 Mar 10 05:00–11:00 Mar 11 04:00–10:00 Mar 13 05:00–10:00 Mar 14 05:00–10:00 Mar 15 04:00–10:00 Mar 16 05:00–10:00 Mar 17 03:00–07:00 Mar 18 04:00–10:00 Mar 20 07:00–10:00 Mar 21 05:00–08:00 Mar 22 06:00–10:00 Mar 23 04:00–10:00 Mar 24 04:00–10:00 Mar 25 05:00–10:00 Mar 27 05:00–10:00 Mar 28 05:00–10:00 Mar 29 05:00–10:00 Mar 30 03:00–10:00 Mar 31 04:00–10:00
April
Apr 1 04:00–11:00 Apr 3 04:00–11:00 Apr 4 04:00–10:00 Apr 5 04:00–10:00 Apr 6 05:00–06:00 Apr 7 04:00–05:00, 07:00–10:00 Apr 8 04:00–10:00 Apr 10 04:00–10:00 Apr 11 04:00–10:00 Apr 12 04:00–10:00 Apr 13 04:00–10:00 Apr 14 03:00–10:00 Apr 15 04:00–10:00 Apr 17 04:00–10:00 Apr 18 04:00–10:00 Apr 19 05:00–06:00, 09:00–10:00 Apr 20 08:00–10:00 Apr 21 04:00–07:00 Apr 22 04:00–10:00 Apr 24 04:00–10:00 Apr 25 04:00–10:00 Apr 26 04:00–10:00 Apr 27 04:00–10:00 Apr 28 07:00–10:00 Apr 30 05:00–10:00
May
May 1 04:00–10:00 May 2 04:00–06:00, 08:00–10:00 May 3 04:00–10:00 May 4 04:00–10:00 May 5 04:00–10:00 May 6 04:00–10:00 May 8 04:00–10:00 May 9 04:00–10:00 May 10 04:00–10:00 May 11 04:00–10:00 May 12 08:00–10:00 May 13 04:00–10:00 May 15 04:00–05:00, 08:00–10:00 May 16 04:00–10:00 May 17 04:00–10:00 May 18 04:00–10:00 May 19 04:00–10:00 May 20 04:00–10:00 May 22 04:00–10:00 May 23 03:00–08:00 May 24 04:00–10:00 May 25 04:00–10:00 May 27 05:00–10:00 May 28 04:00–10:00 May 29 04:00–10:00 May 30 04:00–10:00 May 31 04:00–10:00
June
Jun 1 05:00–10:00 Jun 2 03:00–07:00 Jun 3 04:00–08:00 Jun 5 03:00–07:00 Jun 6 04:00–10:00 Jun 7 04:00–10:00 Jun 8 04:00–10:00 Jun 9 03:00–07:00 Jun 10 04:00–10:00 Jun 11 05:00–10:00 Jun 12 06:00–11:00 Jun 13 05:00–10:00 Jun 14 06:00–09:00 Jun 15 04:00–10:00 Jun 16 07:00–11:00 Jun 17 07:00–11:00 Jun 19 06:00–11:00 Jun 20 06:00–10:00 Jun 21 05:00–10:00 Jun 22 05:00–10:00 Jun 24 05:00–12:00 Jun 25 05:00–11:00 Jun 26 06:00–13:00 Jun 27 06:00–10:00 Jun 28 05:00–10:00 Jun 29 06:00–12:00 Jun 30 05:00–10:00
July
Jul 1 06:00–11:00 Jul 2 06:00–10:00 Jul 3 06:00–13:00 Jul 5 04:00–10:00 Jul 6 05:00–10:00 Jul 7 04:00–10:00 Jul 8 05:00–10:00 Jul 9 04:00–10:00 Jul 10 04:00–11:00 Jul 11 04:00–10:00 Jul 12 07:00–11:00, 13:00–15:00 Jul 13 04:00–11:00 Jul 14 06:00–10:00 Jul 15 04:00–11:00 Jul 17 04:00–11:00 Jul 18 04:00–09:00 Jul 19 05:00–11:00 Jul 20 04:00–11:00 Jul 21 04:00–10:00 Jul 22 04:00–11:00 Jul 24 04:00–11:00 Jul 25 04:00–10:00 Jul 26 05:00–10:00 Jul 27 04:00–11:00 Jul 28 04:00–10:00 Jul 29 04:00–11:00 Jul 30 05:00–07:00 Jul 31 04:00–11:00
August
Aug 1 05:00–07:00 Aug 2 04:00–12:00 Aug 3 06:00–11:00 Aug 4 04:00–11:00 Aug 5 06:00–11:00 Aug 6 04:00–09:00 Aug 7 04:00–10:00 Aug 8 04:00–10:00 Aug 9 05:00–10:00 Aug 10 04:00–10:00 Aug 11 05:00–11:00 Aug 12 04:00–10:00 Aug 14 04:00–10:00 Aug 15 05:00–10:00 Aug 16 05:00–10:00 Aug 17 05:00–11:00 Aug 18 04:00–10:00 Aug 19 04:00–09:00 Aug 21 04:00–10:00 Aug 22 05:00–10:00 Aug 23 04:00–10:00 Aug 24 04:00–10:00 Aug 25 04:00–09:00 Aug 26 06:00–09:00 Aug 28 04:00–09:00 Aug 29 04:00–10:00 Aug 30 04:00–10:00 Aug 31 04:00–10:00
September
Sep 1 04:00–10:00 Sep 2 04:00–10:00 Sep 4 04:00–10:00 Sep 5 04:00–10:00 Sep 6 04:00–10:00 Sep 7 05:00–11:00 Sep 8 04:00–10:00 Sep 9 04:00–09:00 Sep 11 05:00–12:00 Sep 12 06:00–10:00 Sep 13 05:00–10:00 Sep 14 04:00–10:00 Sep 15 04:00–10:00 Sep 16 05:00–10:00 Sep 18 04:00–10:00 Sep 19 04:00–10:00 Sep 20 04:00–11:00 Sep 21 04:00–11:00 Sep 22 04:00–10:00 Sep 23 04:00–10:00 Sep 25 04:00–10:00 Sep 26 04:00–10:00 Sep 27 04:00–11:00 Sep 28 05:00–10:00 Sep 29 04:00–10:00 Sep 30 04:00–09:00
October
Oct 2 04:00–11:00 Oct 3 04:00–10:00 Oct 4 04:00–10:00 Oct 5 05:00–11:00 Oct 6 04:00–10:00 Oct 7 05:00–10:00 Oct 9 05:00–10:00 Oct 10 05:00–10:00 Oct 11 05:00–10:00 Oct 12 06:00–12:00 Oct 13 04:00–09:00 Oct 14 04:00–11:00 Oct 15 04:00–07:00 Oct 16 04:00–10:00 Oct 17 04:00–11:00 Oct 18 05:00–10:00 Oct 19 04:00–10:00 Oct 20 04:00–10:00 Oct 21 05:00–08:00 Oct 23 05:00–10:00 Oct 24 06:00–09:00 Oct 25 04:00–10:00 Oct 26 04:00–10:00 Oct 27 04:00–11:00 Oct 28 05:00–09:00 Oct 30 05:00–10:00 Oct 31 05:00–10:00
November
Nov 1 04:00–11:00 Nov 2 05:00–11:00 Nov 4 04:00–10:00 Nov 5 05:00–10:00 Nov 6 05:00–11:00 Nov 7 05:00–10:00 Nov 8 05:00–11:00 Nov 9 05:00–12:00 Nov 10 05:00–11:00 Nov 11 06:00–12:00 Nov 12 06:00–09:00 Nov 13 05:00–11:00 Nov 14 05:00–10:00 Nov 15 05:00–09:00 Nov 16 05:00–11:00 Nov 17 04:00–10:00 Nov 18 05:00–10:00 Nov 19 05:00–09:00 Nov 20 05:00–11:00 Nov 21 05:00–10:00 Nov 22 05:00–11:00 Nov 23 06:00–12:00 Nov 24 04:00–10:00 Nov 25 05:00–10:00 Nov 27 05:00–10:00 Nov 28 05:00–10:00 Nov 29 05:00–10:00 Nov 30 05:00–10:00
December
Dec 2 05:00–11:00 Dec 4 05:00–11:00 Dec 5 05:00–09:00 Dec 6 06:00–11:00 Dec 7 06:00–11:00 Dec 8 05:00–09:00 Dec 9 05:00–10:00 Dec 11 05:00–10:00 Dec 12 05:00–10:00 Dec 13 07:00–12:00 Dec 14 06:00–12:00 Dec 15 06:00–08:00 Dec 16 05:00–07:00 Dec 18 06:00–10:00 Dec 19 07:00–10:00 Dec 20 05:00–10:00 Dec 21 05:00–10:00 Dec 22 05:00–10:00 Dec 23 05:00–10:00 Dec 25 05:00–09:00 Dec 26 05:00–09:00 Dec 27 05:00–10:00 Dec 28 04:00–10:00 Dec 29 05:00–09:00 Dec 30 05:00–11:00 Dec 31 05:00–10:00