Most often in March, 29 days.
Highest follower count seen that year: 10,313.
January
Jan 19 19:00–24:00 Jan 20 00:00–02:00, 18:00–22:00 Jan 21 12:00–14:00 Jan 22 15:00–17:00, 23:00–24:00 Jan 23 00:00–02:00, 13:00–22:00 Jan 24 16:00–17:00, 19:00–20:00 Jan 26 17:00–24:00 Jan 27 12:00–15:00, 17:00–21:00 Jan 28 14:00–17:00 Jan 29 15:00–21:00 Jan 31 13:00–16:00
February
Feb 2 19:00–24:00 Feb 3 00:00–01:00, 16:00–23:00 Feb 12 12:00–18:00, 21:00–23:00 Feb 13 12:00–17:00, 19:00–21:00 Feb 14 14:00–19:00, 23:00–24:00 Feb 15 00:00–01:00 Feb 16 19:00–23:00 Feb 17 01:00–03:00, 15:00–17:00 Feb 18 12:00–16:00 Feb 19 14:00–17:00, 20:00–23:00 Feb 20 14:00–16:00 Feb 21 14:00–16:00, 22:00–24:00 Feb 22 00:00–01:00, 08:00–09:00, 16:00–17:00 Feb 23 11:00–12:00, 14:00–19:00 Feb 24 15:00–17:00 Feb 25 14:00–16:00 Feb 26 22:00–23:00 Feb 27 12:00–15:00 Feb 28 12:00–14:00
March
Mar 1 11:00–14:00, 16:00–18:00 Mar 3 14:00–21:00 Mar 4 14:00–15:00 Mar 5 11:00–14:00 Mar 6 11:00–13:00, 19:00–22:00 Mar 7 16:00–18:00 Mar 8 10:00–12:00, 17:00–21:00 Mar 9 12:00–16:00, 18:00–20:00 Mar 10 18:00–20:00 Mar 11 13:00–17:00, 19:00–20:00 Mar 12 21:00–22:00 Mar 13 09:00–12:00, 20:00–21:00 Mar 14 16:00–18:00 Mar 16 14:00–21:00 Mar 17 15:00–18:00 Mar 18 00:00–03:00, 12:00–15:00, 19:00–24:00 Mar 19 00:00–01:00, 17:00–19:00 Mar 20 13:00–18:00 Mar 21 13:00–15:00, 17:00–18:00 Mar 22 11:00–14:00, 16:00–17:00 Mar 23 16:00–20:00 Mar 24 17:00–19:00 Mar 25 14:00–16:00 Mar 26 15:00–17:00, 21:00–22:00 Mar 27 21:00–23:00 Mar 28 11:00–13:00 Mar 29 14:00–19:00 Mar 30 13:00–18:00 Mar 31 10:00–12:00
April
Apr 1 21:00–23:00 Apr 2 10:00–12:00, 20:00–22:00 Apr 3 21:00–22:00 Apr 4 11:00–12:00 Apr 5 14:00–16:00 Apr 6 17:00–19:00 Apr 7 11:00–12:00, 19:00–20:00 Apr 9 11:00–12:00 Apr 10 18:00–21:00 Apr 11 11:00–12:00, 18:00–19:00 Apr 14 18:00–19:00 Apr 16 11:00–12:00, 21:00–24:00 Apr 20 15:00–17:00 Apr 22 10:00–12:00, 18:00–20:00 Apr 23 11:00–12:00, 18:00–19:00 Apr 24 22:00–23:00 Apr 26 06:00–12:00 Apr 27 13:00–16:00 Apr 29 21:00–24:00 Apr 30 11:00–12:00
May
May 1 11:00–21:00 May 4 21:00–23:00 May 5 13:00–14:00 May 6 14:00–16:00, 21:00–24:00 May 7 14:00–15:00 May 8 10:00–11:00 May 13 12:00–13:00 May 14 11:00–14:00, 19:00–22:00 May 15 10:00–11:00, 23:00–24:00 May 16 16:00–18:00 May 17 16:00–18:00 May 19 16:00–18:00 May 22 13:00–15:00, 17:00–20:00 May 23 11:00–15:00, 21:00–24:00 May 24 16:00–18:00 May 25 19:00–22:00 May 26 18:00–21:00 May 27 12:00–15:00, 17:00–19:00 May 28 18:00–20:00 May 29 13:00–14:00 May 30 13:00–18:00
June
Jun 1 18:00–20:00 Jun 2 10:00–12:00 Jun 3 16:00–17:00, 20:00–24:00 Jun 4 00:00–02:00, 10:00–13:00 Jun 5 15:00–18:00, 22:00–23:00 Jun 6 12:00–15:00 Jun 9 10:00–13:00 Jun 10 10:00–13:00, 21:00–24:00 Jun 11 19:00–23:00 Jun 12 11:00–13:00, 22:00–24:00 Jun 17 19:00–21:00 Jun 20 22:00–24:00 Jun 21 00:00–02:00 Jun 23 22:00–24:00 Jun 24 21:00–23:00 Jun 26 13:00–15:00 Jun 27 11:00–12:00, 15:00–17:00 Jun 29 11:00–21:00
July
Jul 4 23:00–24:00 Jul 5 00:00–01:00, 12:00–17:00 Jul 6 15:00–21:00 Jul 7 09:00–11:00, 20:00–23:00 Jul 8 10:00–12:00, 17:00–22:00 Jul 10 22:00–24:00 Jul 11 10:00–12:00 Jul 12 18:00–19:00 Jul 13 10:00–14:00, 20:00–22:00 Jul 14 18:00–22:00 Jul 15 17:00–20:00 Jul 16 11:00–12:00, 20:00–24:00 Jul 17 10:00–12:00, 21:00–23:00 Jul 19 11:00–15:00 Jul 20 11:00–14:00, 20:00–22:00 Jul 22 18:00–24:00 Jul 24 10:00–12:00, 18:00–19:00, 21:00–24:00 Jul 25 10:00–12:00 Jul 26 18:00–19:00 Jul 27 11:00–14:00 Jul 28 18:00–22:00 Jul 30 10:00–12:00, 21:00–23:00
August
Aug 1 09:00–11:00 Aug 2 00:00–03:00, 11:00–14:00 Aug 3 11:00–13:00 Aug 6 21:00–24:00 Aug 7 00:00–01:00, 10:00–12:00, 21:00–22:00 Aug 9 19:00–20:00 Aug 10 10:00–14:00, 18:00–19:00 Aug 11 09:00–11:00, 21:00–24:00 Aug 12 09:00–11:00, 21:00–22:00 Aug 14 09:00–10:00, 21:00–22:00 Aug 17 20:00–23:00 Aug 18 08:00–10:00 Aug 19 09:00–10:00 Aug 20 10:00–12:00, 21:00–23:00 Aug 25 22:00–24:00 Aug 26 00:00–01:00, 21:00–24:00 Aug 27 07:00–08:00, 10:00–11:00 Aug 29 09:00–10:00, 20:00–21:00 Aug 30 19:00–21:00 Aug 31 19:00–20:00, 23:00–24:00
September
Sep 1 00:00–01:00, 19:00–21:00 Sep 2 21:00–23:00 Sep 3 10:00–11:00 Sep 4 10:00–11:00, 22:00–23:00 Sep 7 17:00–21:00 Sep 8 10:00–12:00, 22:00–24:00 Sep 9 10:00–12:00, 21:00–23:00 Sep 10 22:00–24:00 Sep 13 11:00–14:00, 18:00–19:00 Sep 14 15:00–19:00 Sep 23 14:00–17:00, 21:00–23:00 Sep 24 15:00–16:00 Sep 25 09:00–12:00, 18:00–20:00 Sep 26 17:00–18:00 Sep 27 10:00–12:00, 16:00–18:00 Sep 28 15:00–17:00 Sep 29 15:00–16:00
October
Oct 2 15:00–16:00 Oct 3 17:00–18:00 Oct 4 18:00–19:00 Oct 5 15:00–16:00, 18:00–19:00 Oct 8 16:00–18:00 Oct 9 09:00–12:00, 14:00–15:00 Oct 11 16:00–20:00 Oct 13 16:00–19:00 Oct 14 15:00–16:00 Oct 15 18:00–19:00 Oct 16 15:00–16:00, 19:00–20:00 Oct 18 10:00–12:00, 16:00–18:00 Oct 19 10:00–11:00, 16:00–17:00 Oct 23 14:00–19:00 Oct 25 10:00–12:00 Oct 26 14:00–19:00 Oct 27 16:00–18:00 Oct 29 16:00–17:00 Oct 30 18:00–19:00 Oct 31 14:00–15:00
November
Nov 2 10:00–11:00, 16:00–18:00 Nov 3 16:00–18:00, 20:00–22:00 Nov 4 21:00–23:00 Nov 5 11:00–12:00, 15:00–17:00 Nov 6 11:00–13:00, 15:00–16:00 Nov 7 12:00–13:00, 15:00–16:00 Nov 8 12:00–15:00 Nov 9 11:00–19:00 Nov 10 16:00–17:00 Nov 11 17:00–18:00 Nov 12 11:00–13:00, 15:00–17:00 Nov 13 12:00–13:00, 21:00–23:00 Nov 19 15:00–16:00 Nov 21 16:00–17:00 Nov 25 18:00–19:00, 22:00–23:00 Nov 27 16:00–17:00, 22:00–23:00 Nov 28 18:00–19:00 Nov 29 19:00–21:00 Nov 30 18:00–20:00
December
Dec 3 11:00–12:00, 19:00–21:00 Dec 8 18:00–19:00 Dec 9 22:00–23:00 Dec 10 12:00–13:00 Dec 11 12:00–13:00 Dec 12 16:00–17:00 Dec 13 18:00–20:00 Dec 14 16:00–17:00 Dec 15 12:00–13:00 Dec 17 19:00–20:00 Dec 20 16:00–19:00 Dec 21 10:00–13:00, 18:00–22:00 Dec 23 22:00–23:00 Dec 25 17:00–21:00 Dec 27 09:00–11:00, 13:00–14:00, 18:00–20:00 Dec 31 15:00–19:00