Most often in May, 27 days.
Highest follower count seen that year: 6,166.
January
Jan 3 12:00–23:00 Jan 4 12:00–19:00 Jan 7 12:00–22:00 Jan 8 12:00–19:00 Jan 9 12:00–19:00 Jan 10 12:00–19:00 Jan 11 12:00–19:00 Jan 13 12:00–19:00 Jan 14 12:00–22:00 Jan 15 12:00–19:00 Jan 16 12:00–19:00 Jan 17 12:00–19:00 Jan 18 12:00–19:00 Jan 20 12:00–19:00 Jan 21 12:00–21:00 Jan 22 12:00–19:00 Jan 23 12:00–19:00 Jan 24 15:00–19:00 Jan 25 12:00–19:00 Jan 27 12:00–19:00 Jan 28 12:00–18:00 Jan 29 12:00–21:00 Jan 30 12:00–19:00 Jan 31 12:00–19:00
February
Feb 1 12:00–19:00 Feb 3 12:00–19:00 Feb 4 12:00–19:00 Feb 5 12:00–20:00 Feb 6 12:00–19:00 Feb 7 12:00–19:00 Feb 8 12:00–19:00 Feb 10 12:00–20:00 Feb 11 12:00–20:00 Feb 12 12:00–21:00 Feb 14 12:00–19:00 Feb 15 12:00–20:00 Feb 17 12:00–19:00 Feb 18 12:00–19:00 Feb 19 12:00–19:00 Feb 20 12:00–20:00 Feb 21 12:00–19:00 Feb 22 12:00–19:00 Feb 24 12:00–19:00 Feb 25 12:00–19:00 Feb 26 12:00–20:00 Feb 27 12:00–19:00 Feb 28 12:00–19:00
March
Mar 1 12:00–18:00 Mar 3 12:00–19:00 Mar 4 12:00–19:00 Mar 5 12:00–19:00 Mar 6 12:00–19:00 Mar 7 12:00–19:00 Mar 8 12:00–19:00 Mar 10 12:00–19:00 Mar 11 12:00–19:00 Mar 12 12:00–20:00 Mar 13 12:00–19:00 Mar 14 12:00–19:00 Mar 15 12:00–19:00 Mar 17 12:00–19:00 Mar 18 12:00–19:00 Mar 19 12:00–20:00 Mar 20 12:00–19:00 Mar 21 12:00–19:00 Mar 22 12:00–18:00 Mar 24 12:00–19:00 Mar 25 12:00–19:00 Mar 26 12:00–20:00 Mar 27 12:00–19:00 Mar 28 12:00–19:00 Mar 29 12:00–19:00 Mar 31 12:00–19:00
April
Apr 1 12:00–19:00 Apr 2 12:00–20:00 Apr 3 12:00–19:00 Apr 4 12:00–19:00 Apr 5 12:00–19:00 Apr 7 12:00–19:00 Apr 8 12:00–20:00 Apr 9 12:00–18:00 Apr 10 12:00–19:00 Apr 11 12:00–19:00 Apr 12 12:00–19:00 Apr 14 12:00–19:00 Apr 15 12:00–19:00 Apr 16 12:00–23:00 Apr 17 12:00–19:00 Apr 21 12:00–19:00 Apr 22 12:00–19:00 Apr 23 12:00–20:00 Apr 24 12:00–19:00 Apr 25 12:00–19:00 Apr 26 12:00–19:00 Apr 28 12:00–14:00 Apr 29 12:00–19:00 Apr 30 12:00–19:00
May
May 1 12:00–19:00 May 2 12:00–19:00 May 3 12:00–19:00 May 5 12:00–14:00, 16:00–19:00 May 6 12:00–19:00 May 7 12:00–19:00 May 8 12:00–19:00 May 9 12:00–19:00 May 10 12:00–18:00 May 12 12:00–19:00 May 13 12:00–19:00 May 14 12:00–19:00 May 15 12:00–19:00 May 16 12:00–19:00 May 17 12:00–19:00 May 19 12:00–19:00 May 20 12:00–19:00 May 21 12:00–19:00 May 22 12:00–18:00 May 23 12:00–19:00 May 24 12:00–19:00 May 26 12:00–19:00 May 27 12:00–19:00 May 28 12:00–19:00 May 29 12:00–19:00 May 30 12:00–19:00 May 31 12:00–19:00
June
Jun 3 12:00–19:00 Jun 4 12:00–24:00 Jun 5 00:00–01:00, 12:00–19:00 Jun 6 12:00–19:00 Jun 7 12:00–19:00 Jun 9 12:00–19:00 Jun 10 12:00–19:00 Jun 11 12:00–13:00, 16:00–17:00, 19:00–20:00 Jun 12 12:00–19:00 Jun 13 12:00–19:00 Jun 14 12:00–19:00 Jun 16 12:00–19:00 Jun 17 12:00–19:00 Jun 18 12:00–19:00 Jun 19 12:00–19:00 Jun 20 12:00–19:00 Jun 21 12:00–19:00 Jun 23 12:00–19:00 Jun 24 12:00–19:00 Jun 25 12:00–20:00 Jun 26 12:00–18:00 Jun 27 12:00–18:00 Jun 28 12:00–19:00
July
Jul 1 12:00–19:00 Jul 2 12:00–21:00 Jul 3 12:00–18:00 Jul 4 12:00–19:00 Jul 5 12:00–19:00 Jul 7 12:00–19:00 Jul 8 12:00–19:00 Jul 9 12:00–20:00 Jul 10 12:00–19:00 Jul 11 12:00–19:00 Jul 12 12:00–19:00 Jul 14 12:00–19:00 Jul 15 12:00–19:00 Jul 16 12:00–19:00 Jul 17 12:00–19:00 Jul 18 12:00–19:00 Jul 19 12:00–19:00 Jul 22 12:00–19:00 Jul 23 12:00–21:00 Jul 24 12:00–19:00 Jul 25 12:00–19:00 Jul 26 12:00–19:00 Jul 28 12:00–19:00 Jul 29 12:00–19:00 Jul 30 12:00–21:00 Jul 31 12:00–18:00
August
Aug 1 12:00–19:00 Aug 2 12:00–19:00 Aug 4 12:00–19:00 Aug 5 12:00–19:00 Aug 6 12:00–20:00 Aug 7 12:00–18:00 Aug 8 12:00–19:00 Aug 9 12:00–19:00 Aug 11 12:00–19:00 Aug 12 13:00–19:00 Aug 13 12:00–19:00 Aug 14 12:00–18:00 Aug 15 12:00–19:00 Aug 16 12:00–19:00 Aug 19 12:00–19:00 Aug 20 12:00–24:00 Aug 21 12:00–18:00 Aug 22 12:00–19:00 Aug 23 12:00–19:00 Aug 25 14:00–19:00 Aug 26 12:00–19:00 Aug 27 12:00–23:00 Aug 28 12:00–19:00 Aug 29 12:00–19:00 Aug 30 12:00–19:00
September
Sep 1 12:00–19:00 Sep 2 12:00–19:00 Sep 3 12:00–20:00 Sep 4 12:00–19:00 Sep 5 12:00–19:00 Sep 6 12:00–19:00 Sep 8 12:00–19:00 Sep 9 12:00–19:00 Sep 10 12:00–20:00 Sep 11 12:00–18:00 Sep 12 12:00–19:00 Sep 13 12:00–19:00 Sep 15 12:00–19:00 Sep 16 12:00–19:00 Sep 17 12:00–19:00 Sep 18 12:00–19:00 Sep 19 12:00–18:00 Sep 20 14:00–21:00 Sep 22 12:00–19:00 Sep 23 12:00–19:00 Sep 24 12:00–19:00 Sep 25 12:00–19:00 Sep 26 12:00–19:00 Sep 27 12:00–19:00 Sep 29 12:00–19:00 Sep 30 12:00–19:00
October
Oct 1 12:00–19:00 Oct 2 12:00–19:00 Oct 3 12:00–19:00 Oct 4 12:00–19:00 Oct 6 12:00–19:00 Oct 7 12:00–19:00 Oct 8 12:00–19:00 Oct 9 12:00–19:00 Oct 10 12:00–19:00 Oct 11 12:00–19:00 Oct 14 12:00–24:00 Oct 15 00:00–01:00, 12:00–20:00 Oct 16 12:00–23:00 Oct 17 12:00–19:00 Oct 20 12:00–19:00 Oct 21 12:00–20:00 Oct 22 12:00–20:00 Oct 23 12:00–19:00 Oct 24 12:00–19:00 Oct 25 12:00–19:00 Oct 27 12:00–19:00 Oct 28 12:00–19:00 Oct 29 12:00–19:00 Oct 30 12:00–19:00 Oct 31 12:00–20:00
November
Nov 1 12:00–18:00 Nov 3 12:00–19:00 Nov 4 12:00–19:00 Nov 5 12:00–20:00 Nov 6 12:00–19:00 Nov 7 12:00–19:00 Nov 8 12:00–19:00 Nov 10 12:00–19:00 Nov 11 12:00–19:00 Nov 12 12:00–19:00 Nov 13 12:00–19:00 Nov 14 12:00–18:00 Nov 15 14:00–19:00 Nov 17 12:00–19:00 Nov 18 12:00–19:00 Nov 19 12:00–19:00 Nov 20 12:00–19:00 Nov 21 12:00–19:00 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 27 12:00–19:00 Nov 28 13:00–20:00 Nov 29 12:00–19:00
December
Dec 1 12:00–19:00 Dec 2 12:00–19:00 Dec 3 12:00–19:00 Dec 4 12:00–19:00 Dec 5 12:00–19:00 Dec 6 12:00–19:00 Dec 8 12:00–19:00 Dec 9 12:00–19:00 Dec 10 12:00–19:00 Dec 11 12:00–19:00 Dec 12 12:00–19:00 Dec 13 12:00–19:00 Dec 15 12:00–19:00 Dec 16 12:00–19:00 Dec 17 12:00–19:00 Dec 18 12:00–19:00 Dec 19 12:00–18:00 Dec 20 12:00–19:00 Dec 22 12:00–19:00 Dec 23 12:00–19:00 Dec 26 12:00–19:00 Dec 27 12:00–19:00 Dec 28 12:00–19:00 Dec 29 12:00–19:00 Dec 30 13:00–19:00