Most often in July, 28 days.
Highest follower count seen that year: 5,130.
January
Jan 3 01:00–04:00, 16:00–18:00, 20:00–21:00 Jan 4 19:00–22:00 Jan 5 05:00–06:00 Jan 7 03:00–06:00, 22:00–24:00 Jan 8 02:00–03:00 Jan 9 04:00–08:00 Jan 10 02:00–05:00 Jan 11 01:00–02:00, 15:00–17:00 Jan 12 01:00–03:00 Jan 14 14:00–17:00 Jan 15 01:00–03:00, 23:00–24:00 Jan 16 00:00–02:00 Jan 17 04:00–07:00 Jan 18 05:00–07:00 Jan 19 02:00–05:00 Jan 21 04:00–06:00 Jan 22 02:00–04:00 Jan 23 02:00–06:00 Jan 24 02:00–06:00 Jan 26 02:00–04:00 Jan 28 03:00–07:00 Jan 29 01:00–05:00 Jan 30 15:00–17:00
February
Feb 1 04:00–07:00, 15:00–17:00 Feb 2 04:00–07:00 Feb 3 03:00–04:00, 16:00–17:00 Feb 4 03:00–06:00 Feb 6 04:00–06:00 Feb 7 01:00–03:00, 15:00–17:00 Feb 8 02:00–04:00 Feb 9 04:00–07:00 Feb 11 04:00–07:00 Feb 12 02:00–03:00 Feb 13 14:00–16:00 Feb 14 02:00–04:00, 14:00–16:00 Feb 15 15:00–16:00 Feb 16 03:00–06:00, 18:00–20:00 Feb 17 23:00–24:00 Feb 18 00:00–02:00 Feb 19 04:00–07:00 Feb 20 02:00–05:00, 15:00–17:00 Feb 21 01:00–03:00 Feb 22 04:00–06:00 Feb 23 01:00–03:00, 05:00–07:00 Feb 24 22:00–24:00 Feb 25 14:00–17:00 Feb 27 03:00–06:00 Feb 28 01:00–02:00, 15:00–17:00
March
Mar 1 05:00–06:00, 15:00–16:00 Mar 3 14:00–16:00 Mar 4 04:00–06:00 Mar 5 21:00–23:00 Mar 6 03:00–05:00 Mar 8 01:00–07:00 Mar 9 15:00–16:00 Mar 10 01:00–03:00 Mar 11 13:00–17:00 Mar 12 01:00–03:00 Mar 13 03:00–04:00 Mar 14 14:00–17:00 Mar 15 04:00–07:00, 15:00–17:00 Mar 16 04:00–06:00, 15:00–17:00 Mar 17 15:00–20:00 Mar 18 14:00–16:00 Mar 19 02:00–03:00, 05:00–07:00 Mar 20 02:00–04:00 Mar 22 03:00–05:00 Mar 23 02:00–06:00, 20:00–22:00 Mar 24 02:00–04:00, 15:00–17:00 Mar 26 20:00–23:00 Mar 28 03:00–06:00 Mar 29 04:00–06:00 Mar 30 14:00–16:00 Mar 31 00:00–03:00, 15:00–16:00
April
Apr 1 03:00–06:00, 16:00–17:00 Apr 2 02:00–03:00, 17:00–20:00 Apr 3 15:00–17:00 Apr 4 03:00–06:00, 15:00–17:00 Apr 5 01:00–04:00 Apr 6 05:00–07:00 Apr 7 20:00–22:00 Apr 8 04:00–07:00 Apr 9 02:00–04:00 Apr 10 14:00–16:00 Apr 11 03:00–06:00 Apr 13 05:00–07:00 Apr 15 00:00–07:00 Apr 16 04:00–06:00, 15:00–17:00 Apr 17 15:00–17:00 Apr 18 00:00–01:00 Apr 20 14:00–16:00 Apr 22 05:00–08:00 Apr 23 03:00–04:00 Apr 25 03:00–06:00 Apr 26 15:00–16:00 Apr 27 16:00–17:00 Apr 29 05:00–06:00
May
May 1 02:00–06:00, 13:00–15:00 May 2 14:00–16:00 May 3 04:00–06:00 May 4 05:00–07:00 May 7 05:00–06:00 May 9 02:00–03:00, 13:00–16:00 May 10 03:00–05:00 May 11 04:00–06:00 May 13 19:00–20:00 May 14 03:00–05:00 May 15 15:00–17:00 May 16 04:00–06:00, 15:00–16:00 May 18 03:00–05:00, 23:00–24:00 May 20 03:00–05:00 May 27 03:00–06:00 May 28 02:00–06:00 May 29 01:00–02:00 May 30 02:00–03:00, 05:00–06:00 May 31 03:00–06:00
June
Jun 1 04:00–07:00 Jun 2 04:00–07:00 Jun 3 03:00–05:00 Jun 4 04:00–07:00 Jun 5 04:00–06:00 Jun 6 03:00–05:00 Jun 7 02:00–03:00, 06:00–07:00 Jun 8 02:00–04:00 Jun 10 05:00–08:00 Jun 11 03:00–05:00 Jun 24 02:00–05:00 Jun 25 03:00–07:00 Jun 26 02:00–05:00 Jun 27 04:00–05:00 Jun 28 02:00–05:00 Jun 29 02:00–04:00 Jun 30 03:00–06:00
July
Jul 1 01:00–03:00 Jul 2 03:00–07:00 Jul 3 02:00–06:00 Jul 4 00:00–03:00 Jul 5 02:00–04:00 Jul 6 01:00–06:00 Jul 7 02:00–04:00 Jul 8 02:00–05:00 Jul 9 03:00–06:00 Jul 10 01:00–03:00 Jul 11 02:00–06:00 Jul 12 03:00–06:00 Jul 13 04:00–06:00 Jul 14 03:00–06:00 Jul 18 00:00–02:00, 04:00–05:00 Jul 19 03:00–06:00 Jul 20 04:00–06:00 Jul 21 00:00–02:00 Jul 22 04:00–06:00 Jul 23 00:00–03:00 Jul 24 00:00–01:00, 03:00–05:00 Jul 25 01:00–06:00 Jul 26 02:00–06:00 Jul 27 23:00–24:00 Jul 28 00:00–04:00 Jul 29 01:00–04:00 Jul 30 02:00–05:00 Jul 31 00:00–04:00
August
Aug 1 00:00–03:00 Aug 2 00:00–05:00 Aug 3 01:00–05:00 Aug 4 03:00–05:00 Aug 6 00:00–05:00, 20:00–22:00 Aug 8 03:00–05:00 Aug 9 00:00–05:00 Aug 10 01:00–06:00 Aug 12 02:00–06:00 Aug 13 01:00–05:00 Aug 14 00:00–05:00 Aug 15 00:00–04:00 Aug 16 01:00–04:00 Aug 18 02:00–04:00 Aug 19 03:00–05:00 Aug 20 04:00–06:00 Aug 22 01:00–05:00 Aug 23 02:00–06:00 Aug 25 04:00–05:00 Aug 26 03:00–05:00 Aug 27 02:00–06:00 Aug 28 00:00–05:00 Aug 29 01:00–06:00 Aug 30 01:00–02:00, 04:00–05:00 Aug 31 02:00–06:00
September
Sep 1 02:00–05:00 Sep 2 01:00–05:00 Sep 3 01:00–07:00 Sep 4 01:00–05:00 Sep 5 01:00–06:00 Sep 6 00:00–04:00 Sep 7 04:00–06:00 Sep 8 00:00–05:00 Sep 9 03:00–06:00 Sep 10 03:00–05:00 Sep 11 02:00–05:00 Sep 12 01:00–06:00 Sep 13 03:00–05:00 Sep 14 00:00–01:00 Sep 17 01:00–05:00 Sep 18 02:00–03:00 Sep 19 02:00–05:00, 23:00–24:00 Sep 20 00:00–02:00, 04:00–06:00 Sep 21 01:00–04:00 Sep 23 03:00–07:00 Sep 24 03:00–07:00 Sep 25 01:00–06:00 Sep 26 03:00–06:00 Sep 27 02:00–06:00 Sep 28 01:00–04:00 Sep 30 02:00–05:00
October
Oct 1 02:00–04:00 Oct 2 03:00–05:00 Oct 3 03:00–05:00 Oct 4 02:00–05:00 Oct 5 05:00–07:00 Oct 6 02:00–05:00 Oct 7 02:00–06:00 Oct 8 03:00–06:00 Oct 9 04:00–06:00 Oct 11 02:00–04:00 Oct 13 03:00–06:00 Oct 14 04:00–06:00 Oct 16 03:00–06:00 Oct 17 02:00–06:00 Oct 18 02:00–06:00 Oct 19 03:00–06:00 Oct 20 03:00–06:00 Oct 21 03:00–05:00 Oct 23 03:00–06:00 Oct 24 03:00–07:00 Oct 25 02:00–06:00 Oct 26 02:00–03:00, 05:00–06:00 Oct 27 03:00–06:00 Oct 28 03:00–06:00 Oct 29 03:00–06:00 Oct 30 02:00–05:00 Oct 31 03:00–06:00
November
Nov 1 01:00–04:00 Nov 2 03:00–06:00 Nov 4 01:00–05:00 Nov 5 01:00–06:00 Nov 6 03:00–06:00 Nov 7 02:00–06:00 Nov 8 02:00–05:00 Nov 9 03:00–07:00 Nov 10 01:00–05:00 Nov 11 03:00–05:00 Nov 12 03:00–06:00 Nov 13 01:00–05:00 Nov 14 02:00–06:00 Nov 16 02:00–05:00 Nov 18 02:00–05:00 Nov 19 02:00–05:00 Nov 20 03:00–06:00 Nov 21 02:00–07:00 Nov 22 01:00–06:00 Nov 24 00:00–03:00 Nov 25 00:00–03:00 Nov 26 01:00–06:00 Nov 27 03:00–06:00 Nov 28 03:00–07:00 Nov 30 04:00–06:00
December
Dec 1 01:00–06:00 Dec 2 02:00–05:00 Dec 3 02:00–06:00 Dec 5 04:00–07:00 Dec 6 03:00–07:00 Dec 7 05:00–08:00 Dec 8 02:00–06:00 Dec 9 04:00–07:00 Dec 11 03:00–07:00 Dec 12 04:00–06:00 Dec 13 03:00–07:00 Dec 14 03:00–05:00 Dec 16 03:00–04:00 Dec 20 04:00–06:00 Dec 23 04:00–07:00 Dec 26 04:00–07:00 Dec 27 03:00–06:00