Most often in July, 24 days.
Highest follower count seen that year: 23,452.
January
Jan 1 13:00–14:00 Jan 3 10:00–15:00 Jan 4 01:00–03:00, 12:00–18:00, 21:00–24:00 Jan 5 00:00–03:00, 12:00–13:00, 17:00–19:00, 22:00–24:00 Jan 6 00:00–03:00 Jan 7 13:00–14:00 Jan 10 08:00–15:00, 23:00–24:00 Jan 11 07:00–17:00 Jan 12 00:00–03:00 Jan 13 22:00–24:00 Jan 14 00:00–01:00, 17:00–24:00 Jan 15 00:00–01:00, 16:00–17:00 Jan 16 20:00–22:00 Jan 17 21:00–23:00 Jan 18 22:00–23:00 Jan 19 00:00–01:00, 08:00–09:00, 23:00–24:00 Jan 20 00:00–02:00, 17:00–18:00 Jan 21 18:00–19:00, 22:00–24:00 Jan 22 22:00–24:00 Jan 23 00:00–01:00 Jan 27 05:00–12:00 Jan 31 13:00–15:00, 18:00–24:00
February
Feb 1 00:00–01:00, 08:00–10:00 Feb 4 17:00–19:00 Feb 8 09:00–13:00 Feb 11 09:00–10:00 Feb 13 15:00–16:00 Feb 17 22:00–24:00 Feb 18 22:00–24:00 Feb 19 11:00–12:00, 20:00–24:00 Feb 20 10:00–12:00, 14:00–15:00, 20:00–23:00 Feb 21 00:00–01:00, 07:00–14:00, 17:00–20:00, 22:00–24:00 Feb 22 00:00–01:00, 11:00–12:00, 16:00–24:00 Feb 23 07:00–11:00, 15:00–16:00, 21:00–24:00 Feb 24 00:00–03:00, 08:00–10:00, 15:00–16:00, 19:00–23:00 Feb 25 00:00–02:00, 09:00–10:00 Feb 27 14:00–15:00, 22:00–24:00 Feb 28 00:00–05:00, 09:00–11:00
March
Mar 1 19:00–20:00 Mar 2 02:00–05:00, 12:00–16:00 Mar 3 12:00–21:00 Mar 6 14:00–15:00 Mar 7 14:00–16:00 Mar 9 08:00–09:00, 21:00–23:00 Mar 11 11:00–12:00 Mar 17 15:00–17:00 Mar 23 13:00–18:00 Mar 26 12:00–13:00 Mar 28 17:00–19:00
April
Apr 4 10:00–12:00 Apr 6 10:00–17:00 Apr 9 11:00–13:00 Apr 10 06:00–10:00 Apr 11 07:00–10:00, 17:00–19:00 Apr 12 07:00–09:00, 13:00–15:00 Apr 13 07:00–13:00 Apr 14 08:00–11:00 Apr 15 09:00–10:00 Apr 16 06:00–08:00 Apr 19 16:00–18:00 Apr 20 09:00–13:00 Apr 21 05:00–08:00 Apr 22 10:00–11:00 Apr 23 05:00–09:00 Apr 24 08:00–11:00, 14:00–16:00 Apr 25 05:00–09:00, 14:00–16:00 Apr 26 05:00–08:00, 11:00–13:00 Apr 28 07:00–09:00
May
May 1 06:00–07:00 May 2 05:00–07:00 May 3 06:00–08:00 May 4 08:00–10:00 May 5 06:00–07:00, 10:00–11:00, 16:00–18:00, 21:00–24:00 May 6 00:00–01:00, 06:00–08:00, 12:00–13:00, 19:00–22:00 May 7 10:00–11:00, 18:00–20:00 May 8 04:00–08:00, 21:00–24:00 May 9 00:00–07:00, 19:00–21:00 May 12 07:00–09:00 May 13 05:00–09:00 May 15 06:00–09:00, 15:00–17:00 May 16 09:00–13:00 May 17 08:00–11:00, 13:00–15:00 May 18 04:00–09:00, 12:00–13:00 May 19 06:00–07:00 May 20 04:00–05:00 May 24 15:00–20:00 May 25 03:00–08:00, 10:00–16:00 May 26 05:00–09:00, 13:00–15:00 May 27 05:00–09:00 May 29 15:00–16:00 May 31 09:00–11:00, 13:00–17:00
June
Jun 1 05:00–10:00, 12:00–13:00, 15:00–17:00 Jun 2 07:00–09:00 Jun 8 07:00–08:00, 16:00–19:00 Jun 9 06:00–08:00 Jun 13 14:00–15:00 Jun 14 08:00–12:00 Jun 15 07:00–08:00, 12:00–15:00 Jun 16 07:00–09:00 Jun 17 08:00–09:00 Jun 20 07:00–08:00, 15:00–16:00 Jun 21 12:00–14:00 Jun 22 07:00–09:00, 11:00–16:00 Jun 23 06:00–09:00, 15:00–16:00 Jun 24 07:00–11:00 Jun 25 06:00–10:00, 16:00–21:00 Jun 27 07:00–09:00 Jun 28 08:00–10:00, 13:00–17:00 Jun 29 06:00–10:00, 14:00–15:00 Jun 30 07:00–10:00
July
Jul 1 06:00–07:00, 09:00–10:00 Jul 5 20:00–23:00 Jul 6 06:00–08:00, 19:00–21:00 Jul 7 08:00–09:00, 13:00–15:00, 19:00–20:00, 22:00–24:00 Jul 8 00:00–01:00, 07:00–08:00 Jul 10 15:00–17:00 Jul 11 07:00–08:00 Jul 12 06:00–13:00, 18:00–20:00 Jul 13 07:00–09:00 Jul 14 06:00–17:00 Jul 15 07:00–12:00 Jul 16 10:00–14:00 Jul 18 08:00–10:00 Jul 19 10:00–11:00 Jul 20 08:00–15:00 Jul 21 16:00–19:00 Jul 22 07:00–14:00 Jul 23 07:00–11:00, 13:00–14:00 Jul 24 07:00–10:00 Jul 25 09:00–13:00 Jul 26 16:00–17:00 Jul 27 07:00–13:00 Jul 28 07:00–13:00 Jul 30 07:00–10:00, 15:00–17:00
August
Aug 1 07:00–08:00, 10:00–11:00 Aug 2 06:00–12:00, 15:00–16:00 Aug 3 07:00–10:00 Aug 4 07:00–11:00, 15:00–17:00 Aug 5 07:00–10:00, 15:00–16:00 Aug 6 07:00–08:00 Aug 7 07:00–08:00, 13:00–14:00 Aug 9 08:00–10:00 Aug 10 08:00–09:00 Aug 11 07:00–13:00 Aug 12 08:00–12:00 Aug 15 07:00–13:00 Aug 17 08:00–10:00, 12:00–13:00, 21:00–24:00 Aug 18 05:00–09:00, 15:00–16:00, 18:00–21:00 Aug 19 09:00–10:00 Aug 20 07:00–10:00, 15:00–19:00 Aug 21 12:00–15:00, 18:00–21:00 Aug 22 16:00–17:00, 19:00–21:00 Aug 23 07:00–12:00, 15:00–17:00 Aug 24 08:00–09:00, 12:00–13:00 Aug 25 07:00–09:00 Aug 26 07:00–08:00, 10:00–11:00 Aug 30 08:00–09:00 Aug 31 09:00–14:00
September
Sep 2 20:00–21:00 Sep 4 04:00–08:00, 22:00–23:00 Sep 5 05:00–07:00, 23:00–24:00 Sep 6 00:00–01:00, 07:00–09:00, 22:00–24:00 Sep 7 00:00–02:00, 07:00–09:00, 11:00–12:00 Sep 8 04:00–07:00, 22:00–23:00 Sep 9 06:00–08:00, 19:00–23:00 Sep 10 05:00–06:00, 21:00–24:00 Sep 11 00:00–01:00, 06:00–07:00, 23:00–24:00 Sep 12 00:00–01:00, 21:00–23:00 Sep 13 05:00–06:00 Sep 15 20:00–21:00 Sep 16 04:00–07:00, 16:00–17:00, 22:00–23:00 Sep 17 04:00–07:00, 22:00–23:00 Sep 19 04:00–05:00, 19:00–21:00 Sep 20 06:00–09:00, 11:00–12:00, 23:00–24:00 Sep 21 00:00–01:00, 06:00–12:00, 21:00–22:00 Sep 22 05:00–09:00, 23:00–24:00 Sep 23 05:00–08:00 Sep 24 10:00–11:00, 16:00–17:00 Sep 26 11:00–12:00, 18:00–19:00 Sep 27 13:00–16:00 Sep 28 06:00–07:00, 16:00–18:00 Sep 30 15:00–18:00
October
Oct 2 17:00–20:00 Oct 3 10:00–13:00 Oct 4 12:00–16:00, 23:00–24:00 Oct 5 05:00–06:00, 08:00–12:00, 15:00–17:00, 19:00–21:00 Oct 6 05:00–06:00, 08:00–10:00 Oct 7 17:00–19:00 Oct 15 10:00–11:00, 15:00–18:00 Oct 16 06:00–11:00, 16:00–17:00 Oct 17 15:00–16:00 Oct 18 07:00–09:00, 16:00–17:00 Oct 20 06:00–13:00 Oct 22 14:00–15:00 Oct 23 15:00–17:00 Oct 24 14:00–20:00 Oct 26 06:00–07:00 Oct 27 05:00–08:00
November
Nov 2 20:00–21:00 Nov 3 18:00–22:00 Nov 4 23:00–24:00 Nov 9 11:00–13:00 Nov 13 06:00–09:00 Nov 14 22:00–23:00 Nov 15 08:00–11:00, 17:00–20:00, 22:00–23:00 Nov 16 01:00–02:00, 10:00–11:00, 17:00–18:00, 20:00–24:00 Nov 17 08:00–09:00, 15:00–16:00 Nov 18 07:00–09:00, 21:00–22:00 Nov 20 04:00–07:00 Nov 22 09:00–11:00 Nov 23 22:00–24:00 Nov 24 09:00–10:00, 20:00–22:00
December
Dec 7 14:00–24:00 Dec 8 00:00–01:00, 08:00–10:00, 21:00–24:00 Dec 9 16:00–17:00, 21:00–22:00 Dec 10 06:00–12:00, 18:00–20:00 Dec 11 04:00–05:00, 07:00–08:00, 19:00–24:00 Dec 12 00:00–01:00, 08:00–09:00, 18:00–19:00, 21:00–24:00 Dec 14 11:00–12:00, 22:00–24:00 Dec 15 07:00–08:00, 22:00–23:00 Dec 16 14:00–15:00 Dec 17 21:00–24:00 Dec 18 16:00–17:00, 22:00–24:00 Dec 19 08:00–10:00, 16:00–17:00, 22:00–24:00 Dec 20 00:00–01:00, 09:00–11:00 Dec 21 12:00–16:00, 18:00–20:00 Dec 22 06:00–07:00, 10:00–11:00 Dec 23 21:00–23:00 Dec 24 07:00–09:00, 18:00–19:00 Dec 25 16:00–18:00, 20:00–22:00 Dec 26 08:00–09:00, 16:00–18:00, 20:00–24:00 Dec 27 10:00–11:00, 15:00–16:00, 21:00–22:00 Dec 28 04:00–06:00, 11:00–14:00, 16:00–17:00 Dec 29 04:00–05:00 Dec 30 12:00–14:00