Most often in March, 28 days.
Highest follower count seen that year: 8,491.
January
Jan 3 04:00–09:00 Jan 4 04:00–11:00 Jan 5 04:00–13:00 Jan 6 12:00–18:00 Jan 8 04:00–14:00 Jan 14 04:00–10:00 Jan 15 04:00–10:00 Jan 16 04:00–10:00 Jan 17 04:00–10:00 Jan 18 05:00–11:00 Jan 19 04:00–11:00 Jan 21 04:00–10:00 Jan 22 04:00–10:00 Jan 23 04:00–10:00 Jan 24 04:00–10:00 Jan 25 04:00–10:00 Jan 26 05:00–11:00 Jan 28 04:00–10:00 Jan 29 04:00–10:00 Jan 30 04:00–10:00 Jan 31 04:00–11:00
February
Feb 1 04:00–10:00 Feb 4 04:00–10:00 Feb 5 04:00–10:00 Feb 6 04:00–10:00 Feb 7 04:00–10:00 Feb 8 04:00–09:00 Feb 9 04:00–11:00 Feb 12 04:00–10:00 Feb 13 04:00–09:00 Feb 14 04:00–10:00 Feb 15 03:00–10:00 Feb 16 04:00–11:00 Feb 18 04:00–09:00 Feb 20 04:00–10:00 Feb 21 04:00–10:00 Feb 22 04:00–09:00 Feb 27 04:00–10:00 Feb 28 04:00–10:00
March
Mar 1 04:00–10:00 Mar 2 05:00–10:00 Mar 5 04:00–09:00 Mar 6 04:00–10:00 Mar 7 00:00–10:00 Mar 8 00:00–10:00 Mar 9 00:00–09:00 Mar 10 22:00–24:00 Mar 11 00:00–04:00, 22:00–24:00 Mar 12 00:00–04:00, 22:00–24:00 Mar 13 00:00–04:00, 22:00–24:00 Mar 14 00:00–04:00, 22:00–24:00 Mar 15 00:00–04:00, 22:00–24:00 Mar 16 00:00–04:00 Mar 17 22:00–24:00 Mar 18 00:00–04:00, 22:00–24:00 Mar 19 00:00–04:00 Mar 20 22:00–24:00 Mar 21 00:00–04:00, 23:00–24:00 Mar 22 00:00–04:00, 23:00–24:00 Mar 23 00:00–04:00 Mar 25 22:00–24:00 Mar 26 00:00–04:00 Mar 27 22:00–24:00 Mar 28 00:00–04:00, 22:00–24:00 Mar 29 00:00–04:00, 23:00–24:00 Mar 30 00:00–03:00 Mar 31 22:00–24:00
April
Apr 1 00:00–04:00, 23:00–24:00 Apr 2 00:00–04:00, 22:00–24:00 Apr 3 00:00–04:00, 22:00–24:00 Apr 4 00:00–04:00 Apr 7 22:00–24:00 Apr 8 00:00–04:00, 22:00–24:00 Apr 9 00:00–04:00, 22:00–24:00 Apr 10 00:00–04:00, 22:00–24:00 Apr 11 00:00–04:00, 22:00–24:00 Apr 12 00:00–05:00, 22:00–24:00 Apr 13 00:00–04:00 Apr 14 23:00–24:00 Apr 15 00:00–06:00, 23:00–24:00 Apr 16 00:00–04:00, 23:00–24:00 Apr 17 00:00–02:00 Apr 22 23:00–24:00 Apr 23 00:00–04:00, 23:00–24:00 Apr 24 00:00–04:00, 23:00–24:00 Apr 25 00:00–04:00, 23:00–24:00 Apr 26 00:00–04:00, 23:00–24:00 Apr 27 00:00–05:00 Apr 28 23:00–24:00 Apr 29 00:00–04:00, 23:00–24:00 Apr 30 00:00–04:00, 23:00–24:00
May
May 1 00:00–03:00 May 2 23:00–24:00 May 3 00:00–04:00 May 6 23:00–24:00 May 7 00:00–04:00, 23:00–24:00 May 8 00:00–04:00, 23:00–24:00 May 9 00:00–04:00, 23:00–24:00 May 10 00:00–04:00, 23:00–24:00 May 11 00:00–04:00 May 13 22:00–24:00 May 14 00:00–04:00, 23:00–24:00 May 15 00:00–04:00, 23:00–24:00 May 16 00:00–04:00, 23:00–24:00 May 17 00:00–04:00, 23:00–24:00 May 18 00:00–04:00 May 20 23:00–24:00 May 21 00:00–04:00, 22:00–24:00 May 22 00:00–04:00, 23:00–24:00 May 23 00:00–04:00, 22:00–24:00 May 24 00:00–04:00, 23:00–24:00 May 25 00:00–04:00 May 27 23:00–24:00 May 28 00:00–04:00, 23:00–24:00 May 29 00:00–04:00, 23:00–24:00 May 30 00:00–04:00, 23:00–24:00 May 31 00:00–04:00, 23:00–24:00
June
Jun 1 00:00–04:00 Jun 4 23:00–24:00 Jun 5 00:00–04:00, 23:00–24:00 Jun 6 00:00–04:00, 23:00–24:00 Jun 7 00:00–04:00 Jun 9 22:00–24:00 Jun 10 00:00–04:00, 23:00–24:00 Jun 11 00:00–04:00, 23:00–24:00 Jun 12 00:00–04:00, 23:00–24:00 Jun 13 00:00–04:00, 23:00–24:00 Jun 14 00:00–04:00, 23:00–24:00 Jun 15 00:00–04:00 Jun 16 23:00–24:00 Jun 17 00:00–04:00 Jun 18 23:00–24:00 Jun 19 00:00–04:00, 23:00–24:00 Jun 20 00:00–05:00, 23:00–24:00 Jun 21 00:00–04:00, 23:00–24:00 Jun 22 00:00–04:00, 12:00–17:00 Jun 25 23:00–24:00 Jun 26 00:00–05:00, 23:00–24:00 Jun 27 00:00–03:00, 22:00–24:00 Jun 28 00:00–04:00, 23:00–24:00 Jun 29 00:00–04:00, 12:00–17:00
July
Jul 2 23:00–24:00 Jul 3 00:00–04:00, 23:00–24:00 Jul 4 00:00–04:00, 22:00–24:00 Jul 5 00:00–04:00 Jul 6 00:00–04:00 Jul 7 23:00–24:00 Jul 8 00:00–04:00, 23:00–24:00 Jul 9 00:00–04:00, 23:00–24:00 Jul 10 00:00–04:00, 23:00–24:00 Jul 11 00:00–04:00 Jul 14 23:00–24:00 Jul 15 00:00–04:00, 22:00–24:00 Jul 16 00:00–04:00 Jul 17 23:00–24:00 Jul 18 00:00–04:00, 23:00–24:00 Jul 19 00:00–04:00 Jul 21 23:00–24:00 Jul 22 00:00–04:00, 23:00–24:00 Jul 23 00:00–04:00, 23:00–24:00 Jul 24 00:00–05:00, 23:00–24:00 Jul 25 00:00–05:00, 23:00–24:00 Jul 26 00:00–04:00, 23:00–24:00 Jul 27 00:00–04:00 Jul 28 23:00–24:00 Jul 29 00:00–04:00, 23:00–24:00 Jul 30 00:00–04:00, 23:00–24:00 Jul 31 00:00–04:00, 23:00–24:00
August
Aug 1 00:00–03:00 Aug 2 23:00–24:00 Aug 3 00:00–05:00 Aug 5 23:00–24:00 Aug 6 00:00–04:00, 23:00–24:00 Aug 7 00:00–03:00, 12:00–18:00 Aug 8 23:00–24:00 Aug 9 00:00–04:00, 23:00–24:00 Aug 10 00:00–04:00 Aug 12 23:00–24:00 Aug 13 00:00–04:00, 23:00–24:00 Aug 14 00:00–04:00, 23:00–24:00 Aug 15 00:00–04:00, 23:00–24:00 Aug 16 00:00–04:00 Aug 20 23:00–24:00 Aug 21 00:00–04:00, 22:00–24:00 Aug 22 00:00–04:00, 22:00–24:00 Aug 23 00:00–04:00, 23:00–24:00 Aug 24 00:00–04:00 Aug 26 22:00–24:00 Aug 27 00:00–04:00, 23:00–24:00 Aug 28 00:00–04:00, 22:00–24:00 Aug 29 00:00–04:00, 22:00–24:00 Aug 30 00:00–04:00, 23:00–24:00 Aug 31 00:00–04:00
September
Sep 1 23:00–24:00 Sep 2 00:00–03:00, 22:00–24:00 Sep 3 00:00–04:00, 23:00–24:00 Sep 4 00:00–04:00, 23:00–24:00 Sep 5 00:00–04:00, 23:00–24:00 Sep 6 00:00–04:00 Sep 8 23:00–24:00 Sep 9 00:00–04:00, 23:00–24:00 Sep 10 00:00–04:00, 23:00–24:00 Sep 11 00:00–04:00, 23:00–24:00 Sep 12 00:00–04:00, 23:00–24:00 Sep 13 00:00–04:00, 23:00–24:00 Sep 14 00:00–04:00 Sep 16 23:00–24:00 Sep 17 00:00–04:00, 22:00–24:00 Sep 18 00:00–04:00, 23:00–24:00 Sep 19 00:00–04:00 Sep 22 22:00–24:00 Sep 23 00:00–04:00, 22:00–24:00 Sep 24 00:00–04:00, 23:00–24:00 Sep 25 00:00–04:00, 23:00–24:00 Sep 26 00:00–05:00 Sep 27 23:00–24:00 Sep 28 00:00–04:00, 23:00–24:00 Sep 29 00:00–04:00 Sep 30 00:00–05:00, 23:00–24:00
October
Oct 1 00:00–04:00, 23:00–24:00 Oct 2 00:00–04:00, 23:00–24:00 Oct 3 00:00–04:00, 23:00–24:00 Oct 4 00:00–04:00, 23:00–24:00 Oct 5 00:00–04:00 Oct 7 23:00–24:00 Oct 8 00:00–04:00, 23:00–24:00 Oct 9 00:00–04:00, 23:00–24:00 Oct 10 00:00–04:00, 23:00–24:00 Oct 11 00:00–04:00 Oct 14 23:00–24:00 Oct 15 00:00–04:00, 23:00–24:00 Oct 16 00:00–04:00 Oct 17 23:00–24:00 Oct 18 00:00–04:00, 23:00–24:00 Oct 19 00:00–04:00 Oct 20 22:00–24:00 Oct 21 00:00–04:00, 23:00–24:00 Oct 22 00:00–04:00, 23:00–24:00 Oct 23 00:00–04:00, 23:00–24:00 Oct 24 00:00–04:00, 23:00–24:00 Oct 25 00:00–04:00 Oct 27 23:00–24:00 Oct 28 00:00–04:00, 23:00–24:00 Oct 29 00:00–05:00, 23:00–24:00 Oct 30 00:00–04:00, 23:00–24:00 Oct 31 00:00–04:00
November
Nov 4 22:00–24:00 Nov 5 00:00–04:00 Nov 6 23:00–24:00 Nov 7 00:00–04:00, 23:00–24:00 Nov 8 00:00–04:00, 23:00–24:00 Nov 9 00:00–04:00, 12:00–18:00 Nov 10 23:00–24:00 Nov 11 00:00–04:00, 23:00–24:00 Nov 12 00:00–04:00, 23:00–24:00 Nov 13 00:00–04:00, 23:00–24:00 Nov 14 00:00–04:00, 23:00–24:00 Nov 15 00:00–04:00, 23:00–24:00 Nov 16 00:00–04:00 Nov 18 23:00–24:00 Nov 19 00:00–04:00, 23:00–24:00 Nov 20 00:00–04:00, 23:00–24:00 Nov 21 00:00–04:00, 23:00–24:00 Nov 22 00:00–04:00 Nov 24 23:00–24:00 Nov 25 00:00–04:00, 23:00–24:00 Nov 26 00:00–03:00, 23:00–24:00 Nov 27 00:00–04:00, 23:00–24:00 Nov 28 00:00–04:00, 23:00–24:00 Nov 29 00:00–04:00
December
Dec 3 05:00–09:00, 23:00–24:00 Dec 4 00:00–04:00, 23:00–24:00 Dec 5 00:00–04:00, 23:00–24:00 Dec 6 00:00–04:00 Dec 7 00:00–04:00, 17:00–22:00 Dec 8 17:00–22:00 Dec 9 23:00–24:00 Dec 10 00:00–07:00, 23:00–24:00 Dec 11 00:00–04:00, 23:00–24:00 Dec 12 00:00–04:00 Dec 13 00:00–09:00, 22:00–24:00 Dec 14 00:00–04:00 Dec 15 23:00–24:00 Dec 16 00:00–04:00 Dec 17 23:00–24:00 Dec 18 00:00–04:00, 23:00–24:00 Dec 19 00:00–04:00 Dec 20 23:00–24:00 Dec 21 00:00–04:00 Dec 22 23:00–24:00 Dec 23 00:00–04:00, 23:00–24:00 Dec 24 00:00–04:00, 13:00–18:00 Dec 26 23:00–24:00 Dec 27 00:00–04:00, 23:00–24:00 Dec 28 00:00–04:00 Dec 30 23:00–24:00 Dec 31 00:00–04:00, 11:00–17:00