Most often in May, 24 days.
Highest follower count seen that year: 4,662.
January
Jan 6 11:00–12:00, 15:00–17:00 Jan 7 13:00–16:00, 20:00–22:00 Jan 8 14:00–19:00 Jan 9 16:00–18:00, 23:00–24:00 Jan 10 15:00–18:00 Jan 24 22:00–23:00 Jan 27 15:00–16:00 Jan 28 13:00–14:00, 19:00–21:00 Jan 30 16:00–18:00
February
Feb 1 11:00–12:00, 14:00–15:00 Feb 3 12:00–15:00 Feb 4 16:00–18:00 Feb 7 14:00–17:00 Feb 10 14:00–18:00 Feb 11 14:00–16:00 Feb 12 15:00–18:00 Feb 13 14:00–18:00 Feb 17 16:00–19:00 Feb 18 14:00–16:00 Feb 19 08:00–14:00 Feb 20 16:00–19:00 Feb 21 14:00–15:00 Feb 24 13:00–14:00, 19:00–22:00 Feb 25 13:00–14:00, 18:00–19:00 Feb 26 16:00–20:00 Feb 28 13:00–15:00
March
Mar 1 13:00–14:00 Mar 4 15:00–16:00 Mar 5 17:00–18:00 Mar 6 14:00–15:00 Mar 7 12:00–15:00 Mar 10 13:00–14:00, 16:00–18:00 Mar 11 15:00–17:00 Mar 12 13:00–15:00 Mar 13 16:00–17:00 Mar 14 23:00–24:00 Mar 15 00:00–01:00, 14:00–17:00 Mar 17 14:00–15:00, 17:00–19:00 Mar 18 16:00–19:00 Mar 19 12:00–13:00 Mar 20 14:00–15:00, 17:00–19:00 Mar 21 13:00–14:00, 17:00–20:00, 22:00–24:00 Mar 22 14:00–20:00 Mar 24 14:00–18:00 Mar 25 12:00–13:00, 17:00–18:00 Mar 26 15:00–17:00 Mar 27 15:00–18:00 Mar 28 15:00–17:00 Mar 31 13:00–14:00
April
Apr 1 12:00–17:00, 21:00–24:00 Apr 2 00:00–03:00, 13:00–17:00 Apr 3 14:00–16:00 Apr 4 13:00–16:00 Apr 7 11:00–19:00 Apr 8 12:00–16:00 Apr 9 12:00–18:00 Apr 11 13:00–14:00 Apr 15 13:00–14:00, 17:00–18:00 Apr 16 12:00–17:00 Apr 17 12:00–14:00 Apr 18 13:00–15:00, 17:00–18:00 Apr 20 14:00–17:00 Apr 23 12:00–18:00 Apr 24 13:00–18:00 Apr 25 13:00–19:00 Apr 29 13:00–16:00 Apr 30 17:00–18:00
May
May 1 12:00–13:00, 15:00–18:00 May 2 13:00–18:00 May 5 11:00–14:00, 16:00–18:00 May 6 12:00–17:00 May 7 12:00–17:00 May 9 15:00–17:00 May 12 13:00–17:00 May 13 12:00–17:00 May 14 12:00–13:00 May 15 13:00–16:00 May 16 13:00–19:00 May 17 13:00–17:00 May 18 16:00–20:00 May 19 16:00–18:00 May 20 12:00–18:00 May 21 13:00–17:00 May 22 14:00–16:00 May 23 14:00–19:00 May 26 12:00–18:00 May 27 13:00–17:00 May 28 12:00–17:00 May 29 13:00–14:00 May 30 21:00–24:00 May 31 11:00–13:00
June
Jun 2 14:00–17:00 Jun 4 13:00–18:00 Jun 5 13:00–16:00 Jun 6 11:00–13:00, 15:00–17:00 Jun 9 14:00–18:00 Jun 10 13:00–17:00 Jun 11 13:00–14:00 Jun 12 15:00–17:00 Jun 13 12:00–13:00, 15:00–18:00 Jun 17 11:00–17:00 Jun 18 12:00–13:00, 17:00–18:00 Jun 19 16:00–18:00, 20:00–21:00 Jun 20 13:00–15:00, 18:00–19:00 Jun 23 12:00–17:00 Jun 24 13:00–18:00 Jun 25 14:00–17:00 Jun 26 12:00–13:00 Jun 30 12:00–17:00
July
Jul 1 13:00–15:00, 17:00–18:00 Jul 2 14:00–15:00 Jul 3 13:00–19:00 Jul 4 13:00–14:00, 20:00–24:00 Jul 5 00:00–02:00, 11:00–14:00 Jul 7 13:00–19:00 Jul 8 12:00–13:00, 15:00–17:00 Jul 9 14:00–18:00 Jul 10 13:00–18:00 Jul 14 16:00–17:00, 19:00–23:00 Jul 15 15:00–16:00 Jul 16 14:00–15:00 Jul 17 12:00–15:00 Jul 18 14:00–20:00, 23:00–24:00 Jul 19 00:00–02:00, 10:00–12:00 Jul 22 13:00–19:00, 22:00–23:00 Jul 25 13:00–15:00, 18:00–19:00, 21:00–24:00 Jul 26 00:00–01:00, 11:00–13:00 Jul 28 13:00–18:00 Jul 29 14:00–18:00 Jul 30 13:00–15:00 Jul 31 15:00–16:00
August
Aug 1 12:00–13:00, 15:00–17:00, 19:00–23:00 Aug 2 10:00–13:00 Aug 4 13:00–14:00, 16:00–17:00 Aug 5 13:00–14:00 Aug 6 16:00–17:00 Aug 7 14:00–17:00 Aug 8 13:00–14:00 Aug 15 14:00–16:00, 20:00–21:00, 23:00–24:00 Aug 16 12:00–16:00 Aug 18 13:00–17:00 Aug 19 14:00–18:00 Aug 20 14:00–18:00 Aug 21 14:00–17:00 Aug 22 15:00–19:00, 21:00–22:00 Aug 23 11:00–12:00 Aug 25 14:00–16:00 Aug 26 14:00–17:00 Aug 27 13:00–14:00, 17:00–18:00 Aug 28 12:00–18:00 Aug 29 13:00–14:00, 16:00–17:00
September
Sep 3 15:00–18:00 Sep 4 14:00–18:00 Sep 5 16:00–22:00 Sep 6 00:00–01:00, 12:00–13:00 Sep 8 13:00–16:00 Sep 9 14:00–15:00 Sep 10 13:00–15:00 Sep 11 14:00–17:00 Sep 12 23:00–24:00 Sep 13 00:00–02:00, 12:00–16:00 Sep 15 12:00–13:00, 15:00–20:00, 23:00–24:00 Sep 16 01:00–03:00, 12:00–16:00 Sep 17 16:00–19:00 Sep 18 12:00–17:00 Sep 19 20:00–24:00 Sep 20 00:00–03:00, 14:00–17:00 Sep 21 23:00–24:00 Sep 22 01:00–03:00, 15:00–18:00 Sep 23 16:00–17:00 Sep 27 01:00–04:00 Sep 29 15:00–18:00 Sep 30 13:00–15:00, 17:00–21:00
October
Oct 2 13:00–17:00 Oct 6 12:00–13:00, 15:00–18:00 Oct 7 14:00–16:00 Oct 8 00:00–03:00, 13:00–18:00 Oct 9 17:00–20:00 Oct 10 15:00–16:00, 23:00–24:00 Oct 11 00:00–01:00, 14:00–15:00 Oct 13 15:00–16:00, 20:00–21:00 Oct 14 01:00–02:00, 17:00–19:00 Oct 15 15:00–16:00, 18:00–23:00 Oct 16 00:00–03:00 Oct 17 22:00–24:00 Oct 18 00:00–01:00, 03:00–04:00, 13:00–17:00 Oct 20 16:00–19:00, 21:00–22:00 Oct 21 14:00–15:00, 17:00–19:00 Oct 22 13:00–19:00 Oct 23 12:00–15:00 Oct 24 22:00–24:00 Oct 25 00:00–04:00, 12:00–18:00 Oct 27 02:00–04:00 Oct 30 15:00–19:00 Oct 31 16:00–18:00, 22:00–23:00
November
Nov 1 00:00–03:00, 16:00–19:00 Nov 3 20:00–24:00 Nov 4 01:00–03:00, 15:00–18:00 Nov 5 16:00–18:00 Nov 6 14:00–18:00 Nov 7 02:00–04:00, 10:00–11:00 Nov 12 14:00–15:00 Nov 13 00:00–01:00, 04:00–05:00, 14:00–16:00 Nov 15 02:00–03:00, 14:00–18:00 Nov 17 15:00–18:00, 23:00–24:00 Nov 18 00:00–03:00, 15:00–18:00 Nov 20 00:00–01:00, 15:00–19:00 Nov 22 02:00–05:00, 14:00–16:00 Nov 24 23:00–24:00 Nov 25 00:00–03:00, 15:00–18:00 Nov 26 17:00–19:00 Nov 27 00:00–04:00, 17:00–19:00 Nov 29 01:00–04:00, 17:00–20:00
December
Dec 1 14:00–16:00, 22:00–24:00 Dec 2 00:00–02:00, 10:00–15:00 Dec 4 16:00–18:00 Dec 5 18:00–21:00 Dec 6 00:00–01:00, 13:00–14:00 Dec 19 22:00–23:00 Dec 20 01:00–04:00, 15:00–20:00 Dec 22 16:00–19:00 Dec 23 02:00–03:00, 13:00–14:00, 17:00–18:00 Dec 26 19:00–20:00 Dec 27 00:00–03:00, 15:00–16:00, 21:00–22:00