Most often in August, 27 days.
Highest follower count seen that year: 48,939.
January
Jan 2 14:00–18:00 Jan 3 14:00–18:00 Jan 5 15:00–18:00, 21:00–24:00 Jan 6 13:00–16:00 Jan 7 13:00–19:00 Jan 8 14:00–20:00 Jan 9 14:00–19:00 Jan 11 14:00–19:00 Jan 12 17:00–21:00 Jan 14 13:00–19:00 Jan 15 12:00–19:00 Jan 16 15:00–19:00 Jan 17 13:00–19:00 Jan 18 22:00–24:00 Jan 19 14:00–18:00, 22:00–24:00 Jan 20 12:00–15:00 Jan 21 13:00–19:00 Jan 22 13:00–20:00 Jan 23 13:00–17:00 Jan 25 15:00–18:00 Jan 27 14:00–19:00 Jan 28 12:00–20:00 Jan 29 13:00–19:00 Jan 30 12:00–18:00 Jan 31 13:00–19:00
February
Feb 1 15:00–18:00 Feb 2 16:00–18:00 Feb 3 14:00–18:00 Feb 6 15:00–18:00 Feb 10 14:00–18:00 Feb 12 13:00–18:00 Feb 13 13:00–19:00 Feb 14 13:00–20:00 Feb 16 14:00–18:00 Feb 17 14:00–17:00, 21:00–23:00 Feb 19 13:00–20:00 Feb 20 20:00–22:00 Feb 21 13:00–21:00 Feb 22 15:00–18:00 Feb 23 16:00–18:00 Feb 24 14:00–20:00 Feb 25 13:00–18:00 Feb 27 14:00–19:00 Feb 28 13:00–20:00
March
Mar 2 14:00–17:00, 22:00–24:00 Mar 3 12:00–21:00 Mar 4 12:00–20:00 Mar 5 12:00–21:00 Mar 6 12:00–19:00 Mar 7 12:00–20:00 Mar 8 16:00–18:00 Mar 9 14:00–17:00 Mar 10 11:00–18:00 Mar 11 11:00–18:00 Mar 12 12:00–17:00 Mar 13 16:00–18:00 Mar 14 12:00–19:00 Mar 15 14:00–18:00 Mar 18 12:00–18:00 Mar 19 14:00–18:00 Mar 21 13:00–18:00 Mar 24 13:00–15:00, 17:00–20:00 Mar 25 13:00–18:00 Mar 26 13:00–21:00 Mar 27 12:00–20:00 Mar 28 12:00–19:00 Mar 29 13:00–16:00 Mar 31 12:00–19:00
April
Apr 1 12:00–18:00 Apr 2 11:00–18:00 Apr 4 12:00–18:00 Apr 6 13:00–16:00 Apr 7 11:00–21:00 Apr 8 12:00–20:00 Apr 9 12:00–19:00 Apr 10 11:00–19:00 Apr 11 11:00–20:00 Apr 17 12:00–20:00 Apr 18 14:00–18:00 Apr 19 17:00–18:00 Apr 21 12:00–21:00 Apr 22 12:00–17:00 Apr 23 13:00–20:00 Apr 24 15:00–19:00 Apr 25 12:00–18:00 Apr 27 14:00–18:00 Apr 28 12:00–14:00, 22:00–24:00 Apr 29 12:00–21:00 Apr 30 11:00–19:00
May
May 1 13:00–20:00 May 2 12:00–20:00 May 4 15:00–18:00 May 6 12:00–18:00 May 7 11:00–18:00 May 8 00:00–03:00, 14:00–18:00 May 10 14:00–19:00 May 12 13:00–18:00, 20:00–21:00 May 13 12:00–19:00, 23:00–24:00 May 14 00:00–02:00, 12:00–18:00 May 15 12:00–21:00 May 16 13:00–20:00, 22:00–24:00 May 18 18:00–20:00 May 19 23:00–24:00 May 20 00:00–01:00, 14:00–18:00, 21:00–23:00 May 21 13:00–16:00 May 22 11:00–16:00, 18:00–21:00 May 23 12:00–21:00 May 26 12:00–20:00 May 27 12:00–20:00 May 28 12:00–19:00 May 29 14:00–16:00 May 30 12:00–19:00, 22:00–24:00
June
Jun 2 14:00–20:00 Jun 3 00:00–02:00, 14:00–17:00 Jun 5 12:00–17:00 Jun 6 02:00–04:00, 11:00–19:00 Jun 8 15:00–17:00 Jun 9 12:00–20:00, 23:00–24:00 Jun 10 00:00–01:00, 17:00–20:00 Jun 11 13:00–18:00 Jun 12 00:00–03:00, 12:00–18:00 Jun 13 14:00–19:00 Jun 14 17:00–19:00, 22:00–24:00 Jun 15 19:00–20:00 Jun 16 12:00–18:00 Jun 17 12:00–19:00, 21:00–22:00 Jun 18 12:00–16:00, 18:00–21:00 Jun 19 13:00–18:00 Jun 20 12:00–20:00 Jun 24 14:00–16:00 Jun 25 12:00–16:00 Jun 26 12:00–18:00 Jun 27 12:00–17:00
July
Jul 1 12:00–15:00 Jul 3 12:00–18:00 Jul 4 17:00–20:00 Jul 7 15:00–22:00 Jul 8 12:00–18:00, 20:00–23:00 Jul 9 12:00–17:00 Jul 15 13:00–20:00 Jul 16 13:00–15:00 Jul 17 17:00–21:00 Jul 18 12:00–20:00 Jul 20 13:00–16:00, 22:00–24:00 Jul 21 11:00–16:00, 18:00–21:00 Jul 22 10:00–18:00 Jul 23 11:00–18:00, 22:00–24:00 Jul 24 11:00–19:00 Jul 25 11:00–15:00 Jul 27 12:00–14:00, 22:00–24:00 Jul 29 11:00–19:00 Jul 30 01:00–03:00, 11:00–18:00 Jul 31 00:00–02:00, 11:00–18:00, 22:00–24:00
August
Aug 1 00:00–02:00, 11:00–17:00 Aug 2 11:00–12:00 Aug 5 12:00–14:00 Aug 6 11:00–18:00 Aug 7 00:00–03:00, 12:00–21:00 Aug 8 03:00–05:00, 11:00–18:00, 22:00–24:00 Aug 10 14:00–18:00 Aug 11 11:00–15:00, 17:00–19:00 Aug 12 00:00–03:00, 11:00–16:00 Aug 13 11:00–18:00, 23:00–24:00 Aug 14 00:00–02:00, 11:00–18:00 Aug 15 00:00–03:00, 12:00–18:00 Aug 16 14:00–17:00 Aug 17 11:00–13:00, 18:00–19:00 Aug 18 12:00–15:00 Aug 19 11:00–19:00 Aug 20 12:00–14:00, 17:00–19:00 Aug 21 20:00–22:00 Aug 22 13:00–16:00 Aug 23 18:00–20:00 Aug 24 11:00–12:00 Aug 25 14:00–17:00 Aug 26 11:00–14:00, 16:00–20:00 Aug 27 00:00–03:00, 11:00–18:00 Aug 28 11:00–18:00 Aug 29 12:00–15:00 Aug 31 16:00–20:00
September
Sep 1 14:00–19:00 Sep 2 00:00–01:00, 12:00–18:00 Sep 3 12:00–17:00 Sep 4 11:00–13:00, 17:00–19:00, 23:00–24:00 Sep 5 15:00–16:00 Sep 6 12:00–14:00, 17:00–20:00 Sep 7 14:00–16:00, 21:00–24:00 Sep 8 12:00–17:00 Sep 9 12:00–21:00, 23:00–24:00 Sep 10 00:00–03:00, 12:00–18:00, 23:00–24:00 Sep 11 00:00–01:00, 12:00–20:00 Sep 12 11:00–16:00 Sep 13 22:00–24:00 Sep 14 00:00–01:00, 14:00–18:00 Sep 16 12:00–17:00 Sep 17 11:00–16:00, 18:00–21:00 Sep 18 14:00–17:00 Sep 23 12:00–16:00, 18:00–21:00 Sep 24 12:00–16:00 Sep 25 12:00–17:00 Sep 26 00:00–01:00, 13:00–16:00, 18:00–20:00 Sep 27 14:00–16:00 Sep 29 12:00–16:00, 19:00–21:00 Sep 30 12:00–18:00
October
Oct 2 12:00–17:00 Oct 6 12:00–16:00 Oct 7 12:00–18:00 Oct 8 01:00–03:00, 16:00–19:00 Oct 9 14:00–18:00 Oct 10 00:00–03:00, 12:00–17:00 Oct 11 11:00–12:00, 14:00–17:00 Oct 15 14:00–16:00, 18:00–20:00 Oct 16 12:00–17:00, 19:00–21:00 Oct 17 12:00–15:00, 22:00–24:00 Oct 19 13:00–17:00 Oct 20 12:00–23:00 Oct 21 12:00–15:00, 19:00–21:00 Oct 22 14:00–16:00, 19:00–21:00 Oct 23 14:00–16:00 Oct 24 13:00–19:00 Oct 28 12:00–14:00, 16:00–21:00 Oct 29 00:00–01:00, 12:00–13:00, 17:00–19:00 Oct 30 13:00–15:00, 17:00–20:00 Oct 31 00:00–01:00, 12:00–15:00, 18:00–19:00, 22:00–24:00
November
Nov 1 14:00–17:00 Nov 3 14:00–22:00 Nov 4 12:00–21:00 Nov 5 03:00–04:00, 20:00–24:00 Nov 6 12:00–14:00, 16:00–21:00 Nov 7 12:00–20:00 Nov 9 23:00–24:00 Nov 10 00:00–01:00, 12:00–16:00 Nov 13 13:00–18:00 Nov 14 12:00–16:00 Nov 16 13:00–15:00 Nov 17 12:00–18:00 Nov 18 12:00–17:00 Nov 19 13:00–20:00 Nov 20 01:00–03:00, 13:00–17:00 Nov 21 14:00–16:00, 18:00–20:00, 23:00–24:00 Nov 22 00:00–01:00 Nov 24 17:00–21:00 Nov 25 14:00–17:00 Nov 28 13:00–18:00, 23:00–24:00 Nov 29 00:00–01:00 Nov 30 15:00–17:00
December
Dec 1 13:00–18:00 Dec 2 14:00–18:00 Dec 4 15:00–19:00 Dec 5 02:00–04:00, 16:00–19:00 Dec 6 23:00–24:00 Dec 7 00:00–01:00, 13:00–14:00, 17:00–19:00, 22:00–24:00 Dec 8 15:00–20:00 Dec 9 15:00–18:00 Dec 10 13:00–18:00 Dec 11 15:00–17:00 Dec 12 02:00–04:00, 14:00–17:00 Dec 13 15:00–18:00 Dec 14 18:00–20:00 Dec 15 16:00–20:00 Dec 16 03:00–05:00 Dec 17 13:00–18:00 Dec 18 13:00–19:00 Dec 19 12:00–13:00, 18:00–23:00 Dec 20 13:00–16:00 Dec 21 12:00–15:00, 21:00–23:00 Dec 22 13:00–18:00 Dec 23 03:00–05:00, 12:00–16:00 Dec 24 12:00–16:00 Dec 30 13:00–17:00 Dec 31 12:00–16:00