Most often in May, 26 days.
Highest follower count seen that year: 8,810.
January
Jan 4 12:00–19:00 Jan 5 11:00–20:00 Jan 7 12:00–19:00 Jan 9 11:00–19:00 Jan 10 11:00–19:00 Jan 11 12:00–19:00 Jan 12 12:00–19:00 Jan 13 11:00–19:00 Jan 14 11:00–19:00 Jan 16 12:00–19:00 Jan 17 12:00–19:00 Jan 18 12:00–19:00 Jan 19 11:00–19:00 Jan 20 12:00–19:00 Jan 21 12:00–19:00 Jan 23 12:00–19:00 Jan 24 14:00–19:00 Jan 25 11:00–19:00 Jan 26 11:00–19:00 Jan 27 12:00–19:00 Jan 28 12:00–19:00 Jan 30 12:00–19:00 Jan 31 12:00–19:00
February
Feb 1 11:00–19:00 Feb 2 12:00–19:00 Feb 3 13:00–19:00 Feb 4 12:00–19:00 Feb 6 12:00–19:00 Feb 7 12:00–19:00 Feb 8 12:00–21:00 Feb 9 12:00–19:00 Feb 10 12:00–21:00 Feb 11 12:00–21:00 Feb 13 12:00–18:00 Feb 14 12:00–19:00 Feb 15 12:00–19:00 Feb 16 12:00–19:00 Feb 17 12:00–22:00 Feb 18 12:00–18:00 Feb 19 13:00–19:00 Feb 20 12:00–22:00 Feb 21 12:00–19:00 Feb 22 12:00–19:00 Feb 23 12:00–19:00 Feb 24 11:00–19:00 Feb 28 14:00–19:00
March
Mar 2 12:00–20:00 Mar 3 12:00–19:00 Mar 4 11:00–19:00 Mar 5 12:00–19:00 Mar 10 11:00–19:00 Mar 11 12:00–22:00 Mar 12 12:00–19:00 Mar 14 12:00–19:00 Mar 15 12:00–19:00 Mar 16 12:00–19:00 Mar 17 13:00–22:00 Mar 18 12:00–20:00 Mar 19 12:00–19:00 Mar 21 12:00–20:00 Mar 22 12:00–17:00 Mar 23 13:00–19:00 Mar 24 12:00–19:00 Mar 25 11:00–19:00 Mar 26 14:00–22:00 Mar 28 12:00–20:00 Mar 29 11:00–19:00 Mar 30 11:00–19:00 Mar 31 13:00–19:00
April
Apr 1 12:00–19:00 Apr 2 11:00–18:00 Apr 4 12:00–19:00 Apr 5 11:00–19:00 Apr 6 11:00–15:00 Apr 8 12:00–19:00 Apr 9 12:00–18:00 Apr 10 11:00–19:00 Apr 11 12:00–19:00 Apr 12 12:00–19:00 Apr 13 13:00–19:00 Apr 14 15:00–23:00 Apr 15 12:00–19:00 Apr 25 13:00–22:00 Apr 26 11:00–19:00 Apr 27 11:00–17:00 Apr 28 12:00–14:00 Apr 29 12:00–21:00
May
May 2 11:00–19:00 May 3 11:00–18:00 May 4 11:00–19:00 May 5 12:00–14:00, 16:00–19:00 May 6 12:00–19:00 May 7 11:00–19:00 May 9 11:00–19:00 May 10 11:00–19:00 May 11 16:00–19:00 May 12 12:00–21:00 May 13 12:00–19:00 May 14 12:00–19:00 May 16 14:00–21:00 May 17 12:00–19:00 May 18 12:00–19:00 May 19 12:00–19:00 May 20 13:00–19:00 May 21 12:00–19:00 May 23 11:00–19:00 May 24 11:00–19:00 May 25 12:00–19:00 May 26 12:00–19:00 May 27 12:00–19:00 May 28 11:00–19:00 May 30 11:00–19:00 May 31 12:00–19:00
June
Jun 1 12:00–19:00 Jun 2 12:00–19:00 Jun 3 12:00–19:00 Jun 4 12:00–19:00 Jun 6 12:00–19:00 Jun 7 13:00–20:00 Jun 8 12:00–19:00 Jun 9 12:00–19:00 Jun 10 13:00–16:00, 18:00–19:00 Jun 11 12:00–19:00 Jun 13 12:00–19:00 Jun 14 12:00–19:00 Jun 15 12:00–15:00 Jun 16 12:00–19:00 Jun 17 12:00–19:00 Jun 18 12:00–19:00 Jun 21 12:00–19:00 Jun 22 11:00–19:00 Jun 23 12:00–19:00 Jun 27 13:00–18:00 Jun 29 12:00–19:00 Jun 30 11:00–19:00
July
Jul 1 13:00–19:00 Jul 2 12:00–20:00 Jul 4 12:00–19:00 Jul 5 12:00–19:00 Jul 6 12:00–19:00 Jul 7 15:00–19:00 Jul 8 12:00–19:00 Jul 9 12:00–20:00 Jul 11 12:00–21:00 Jul 13 11:00–19:00 Jul 14 12:00–19:00 Jul 15 12:00–19:00 Jul 16 12:00–19:00 Jul 18 11:00–19:00 Jul 19 12:00–19:00 Jul 20 12:00–19:00 Jul 21 12:00–19:00 Jul 22 12:00–19:00 Jul 25 12:00–19:00 Jul 26 12:00–19:00 Jul 27 12:00–19:00 Jul 29 12:00–22:00 Jul 30 12:00–22:00
August
Aug 1 12:00–19:00 Aug 2 13:00–19:00 Aug 3 11:00–19:00 Aug 4 11:00–19:00 Aug 5 13:00–19:00 Aug 6 15:00–20:00 Aug 8 12:00–19:00 Aug 9 13:00–19:00 Aug 12 12:00–22:00 Aug 13 13:00–22:00 Aug 15 12:00–19:00 Aug 16 12:00–19:00 Aug 18 12:00–19:00 Aug 19 12:00–19:00 Aug 20 12:00–23:00 Aug 22 11:00–19:00 Aug 23 12:00–19:00 Aug 24 12:00–19:00 Aug 25 14:00–19:00 Aug 26 12:00–18:00 Aug 27 12:00–19:00 Aug 30 11:00–19:00 Aug 31 12:00–19:00
September
Sep 2 12:00–19:00 Sep 3 12:00–19:00 Sep 5 11:00–19:00 Sep 6 11:00–18:00 Sep 7 13:00–19:00 Sep 9 12:00–19:00 Sep 10 12:00–19:00 Sep 12 15:00–22:00 Sep 13 12:00–19:00 Sep 14 12:00–19:00 Sep 16 15:00–19:00 Sep 17 12:00–19:00 Sep 20 12:00–19:00 Sep 21 12:00–19:00 Sep 22 13:00–19:00 Sep 23 12:00–19:00 Sep 24 12:00–19:00 Sep 26 12:00–18:00 Sep 27 13:00–19:00 Sep 28 13:00–19:00 Sep 30 12:00–19:00
October
Oct 3 12:00–20:00 Oct 4 11:00–19:00 Oct 15 12:00–19:00 Oct 17 12:00–19:00 Oct 19 12:00–19:00 Oct 21 04:00–11:00, 13:00–19:00 Oct 22 14:00–19:00 Oct 24 11:00–19:00 Oct 27 12:00–19:00 Oct 29 14:00–22:00 Oct 30 13:00–18:00 Oct 31 12:00–20:00
November
Nov 2 12:00–19:00 Nov 3 12:00–19:00 Nov 4 12:00–19:00 Nov 5 12:00–19:00 Nov 8 14:00–19:00 Nov 9 12:00–19:00 Nov 10 13:00–19:00 Nov 11 12:00–19:00 Nov 12 12:00–19:00 Nov 14 12:00–19:00 Nov 16 12:00–19:00 Nov 18 15:00–20:00 Nov 19 12:00–20:00 Nov 21 14:00–21:00 Nov 22 12:00–19:00 Nov 24 12:00–19:00 Nov 25 12:00–19:00 Nov 26 12:00–19:00 Nov 29 12:00–20:00 Nov 30 12:00–19:00
December
Dec 1 13:00–19:00 Dec 3 14:00–20:00 Dec 5 13:00–23:00 Dec 6 14:00–22:00 Dec 9 13:00–20:00 Dec 10 14:00–19:00 Dec 12 12:00–19:00 Dec 14 12:00–19:00 Dec 15 12:00–19:00