Most often in July, 29 days.
Highest follower count seen that year: 3,421.
March
Mar 1 21:00–22:00 Mar 2 01:00–08:00 Mar 3 00:00–07:00 Mar 5 06:00–09:00 Mar 6 03:00–07:00 Mar 7 00:00–06:00 Mar 8 00:00–06:00 Mar 10 00:00–06:00 Mar 11 00:00–07:00 Mar 12 00:00–07:00 Mar 13 03:00–07:00 Mar 14 00:00–05:00 Mar 15 01:00–07:00 Mar 16 00:00–07:00 Mar 17 01:00–08:00 Mar 18 00:00–06:00 Mar 20 01:00–07:00 Mar 21 00:00–08:00 Mar 22 00:00–08:00 Mar 23 01:00–07:00 Mar 24 00:00–07:00 Mar 25 00:00–07:00 Mar 27 00:00–06:00 Mar 28 00:00–06:00 Mar 29 01:00–04:00 Mar 30 01:00–09:00 Mar 31 00:00–08:00
April
Apr 1 00:00–05:00 Apr 2 03:00–05:00 Apr 3 01:00–08:00 Apr 4 00:00–08:00 Apr 5 01:00–08:00 Apr 6 05:00–06:00 Apr 8 00:00–09:00 Apr 9 00:00–08:00 Apr 10 00:00–09:00 Apr 11 00:00–10:00 Apr 12 00:00–08:00 Apr 13 01:00–08:00 Apr 14 00:00–10:00, 21:00–22:00 Apr 15 01:00–11:00 Apr 16 00:00–08:00, 22:00–23:00 Apr 17 00:00–03:00 Apr 22 00:00–08:00 Apr 23 00:00–10:00 Apr 24 02:00–09:00 Apr 25 02:00–11:00 Apr 26 01:00–10:00 Apr 27 00:00–10:00 Apr 28 09:00–11:00 Apr 29 00:00–11:00 Apr 30 01:00–04:00, 06:00–07:00
May
May 1 01:00–09:00 May 3 02:00–11:00 May 4 04:00–07:00 May 5 04:00–10:00 May 6 00:00–08:00 May 7 00:00–10:00 May 8 01:00–07:00, 09:00–10:00 May 9 00:00–09:00 May 11 00:00–09:00 May 12 02:00–04:00, 08:00–10:00 May 13 01:00–09:00 May 14 00:00–10:00 May 15 00:00–06:00, 08:00–10:00 May 16 00:00–09:00 May 17 00:00–10:00 May 18 01:00–10:00 May 19 01:00–11:00 May 20 02:00–10:00 May 21 00:00–11:00 May 22 03:00–06:00, 08:00–10:00 May 23 05:00–10:00 May 25 00:00–06:00 May 26 00:00–05:00, 07:00–09:00 May 27 00:00–11:00 May 28 00:00–09:00 May 29 00:00–11:00 May 30 00:00–10:00 May 31 01:00–10:00
June
Jun 1 02:00–07:00 Jun 2 00:00–10:00 Jun 3 00:00–08:00 Jun 4 01:00–03:00 Jun 5 01:00–10:00 Jun 6 01:00–10:00 Jun 7 00:00–09:00 Jun 8 00:00–11:00 Jun 9 00:00–10:00 Jun 10 00:00–10:00 Jun 11 01:00–11:00 Jun 12 00:00–10:00 Jun 13 01:00–11:00 Jun 14 03:00–09:00 Jun 16 02:00–03:00, 05:00–11:00 Jun 23 00:00–09:00 Jun 24 01:00–08:00 Jun 25 00:00–10:00 Jun 26 01:00–08:00 Jun 27 00:00–03:00, 05:00–09:00 Jun 28 01:00–06:00, 08:00–09:00 Jun 29 01:00–11:00 Jun 30 00:00–10:00
July
Jul 1 01:00–09:00 Jul 2 00:00–10:00 Jul 3 01:00–02:00 Jul 4 00:00–10:00 Jul 5 00:00–12:00 Jul 6 02:00–07:00 Jul 7 02:00–08:00 Jul 8 01:00–09:00 Jul 9 01:00–07:00 Jul 11 01:00–05:00 Jul 12 00:00–08:00 Jul 13 00:00–08:00 Jul 14 02:00–07:00 Jul 15 02:00–08:00 Jul 16 00:00–09:00 Jul 17 02:00–09:00 Jul 19 01:00–10:00 Jul 20 01:00–10:00 Jul 21 00:00–06:00 Jul 22 01:00–09:00 Jul 23 00:00–08:00 Jul 24 01:00–07:00 Jul 25 01:00–08:00 Jul 26 01:00–08:00 Jul 27 01:00–10:00 Jul 28 02:00–11:00 Jul 29 00:00–07:00 Jul 30 01:00–08:00 Jul 31 01:00–09:00
August
Aug 1 00:00–06:00 Aug 3 01:00–11:00 Aug 4 01:00–07:00 Aug 5 06:00–08:00 Aug 6 01:00–10:00 Aug 7 01:00–06:00 Aug 8 01:00–08:00 Aug 10 01:00–08:00 Aug 11 01:00–12:00 Aug 12 00:00–10:00 Aug 13 01:00–08:00, 21:00–23:00 Aug 14 02:00–07:00 Aug 15 01:00–08:00 Aug 16 02:00–06:00 Aug 17 03:00–07:00 Aug 21 01:00–07:00 Aug 22 03:00–09:00, 23:00–24:00 Aug 23 01:00–09:00 Aug 24 00:00–05:00 Aug 25 02:00–06:00 Aug 26 01:00–09:00 Aug 27 01:00–08:00 Aug 29 00:00–09:00 Aug 30 00:00–08:00 Aug 31 00:00–09:00
September
Sep 1 00:00–09:00 Sep 2 01:00–07:00 Sep 3 01:00–08:00 Sep 4 01:00–10:00 Sep 6 00:00–08:00 Sep 7 01:00–10:00 Sep 8 00:00–09:00 Sep 9 00:00–07:00 Sep 11 01:00–07:00 Sep 12 00:00–08:00 Sep 13 01:00–07:00 Sep 14 01:00–08:00 Sep 15 00:00–09:00 Sep 16 00:00–06:00 Sep 17 00:00–09:00 Sep 18 01:00–07:00 Sep 19 00:00–08:00 Sep 20 01:00–09:00 Sep 22 00:00–08:00 Sep 23 01:00–07:00 Sep 25 01:00–10:00 Sep 26 01:00–07:00 Sep 27 00:00–08:00 Sep 28 01:00–10:00 Sep 29 01:00–12:00 Sep 30 05:00–13:00
October
Oct 1 00:00–07:00 Oct 2 01:00–09:00 Oct 3 02:00–09:00 Oct 4 03:00–08:00 Oct 5 02:00–10:00 Oct 6 01:00–08:00 Oct 7 02:00–07:00 Oct 8 00:00–09:00 Oct 10 01:00–10:00 Oct 11 01:00–08:00 Oct 12 01:00–08:00 Oct 13 01:00–07:00 Oct 14 01:00–06:00 Oct 15 01:00–08:00 Oct 16 01:00–06:00 Oct 19 01:00–08:00 Oct 20 00:00–08:00 Oct 21 01:00–07:00 Oct 22 02:00–07:00 Oct 23 01:00–07:00 Oct 25 01:00–09:00 Oct 26 01:00–07:00 Oct 27 02:00–08:00 Oct 28 02:00–08:00 Oct 29 05:00–09:00 Oct 30 02:00–08:00 Oct 31 02:00–09:00
November
Nov 2 02:00–11:00 Nov 3 01:00–10:00 Nov 4 01:00–07:00 Nov 5 01:00–09:00 Nov 6 01:00–08:00 Nov 9 01:00–11:00 Nov 10 01:00–07:00 Nov 11 01:00–09:00 Nov 12 01:00–08:00 Nov 13 02:00–08:00 Nov 15 01:00–07:00 Nov 16 01:00–06:00 Nov 17 01:00–07:00 Nov 18 04:00–06:00 Nov 19 02:00–06:00 Nov 20 03:00–08:00 Nov 21 01:00–08:00 Nov 23 02:00–10:00 Nov 24 01:00–09:00 Nov 25 02:00–10:00 Nov 26 02:00–07:00 Nov 27 01:00–09:00 Nov 30 04:00–11:00, 23:00–24:00
December
Dec 1 00:00–10:00 Dec 3 01:00–08:00 Dec 4 01:00–07:00 Dec 5 01:00–07:00 Dec 6 01:00–10:00 Dec 7 02:00–10:00 Dec 9 01:00–10:00 Dec 10 03:00–09:00 Dec 11 03:00–11:00 Dec 12 01:00–08:00 Dec 13 01:00–10:00 Dec 14 03:00–10:00, 23:00–24:00 Dec 15 00:00–10:00 Dec 16 00:00–07:00 Dec 17 01:00–08:00 Dec 19 01:00–07:00 Dec 20 01:00–08:00 Dec 21 02:00–08:00 Dec 22 01:00–08:00 Dec 24 01:00–09:00 Dec 25 01:00–11:00 Dec 26 02:00–07:00 Dec 27 02:00–06:00, 08:00–09:00 Dec 28 02:00–08:00 Dec 29 02:00–09:00, 23:00–24:00