Most often in September, 29 days.
Highest follower count seen that year: 2,797.
May
May 8 18:00–24:00 May 9 00:00–01:00, 07:00–10:00, 12:00–18:00 May 10 18:00–22:00 May 11 07:00–23:00 May 12 08:00–09:00, 11:00–23:00 May 13 08:00–13:00, 16:00–21:00 May 14 09:00–16:00, 18:00–23:00 May 15 08:00–19:00 May 16 04:00–07:00, 10:00–21:00 May 17 19:00–23:00 May 18 07:00–09:00, 13:00–23:00 May 19 06:00–16:00 May 20 06:00–10:00, 15:00–22:00 May 21 13:00–15:00, 19:00–22:00 May 22 04:00–11:00, 16:00–19:00 May 23 03:00–07:00 May 24 18:00–21:00 May 25 08:00–19:00 May 26 08:00–11:00, 14:00–17:00
June
Jun 2 16:00–21:00 Jun 3 06:00–08:00, 12:00–22:00 Jun 4 08:00–10:00, 12:00–23:00 Jun 5 07:00–09:00, 12:00–22:00 Jun 6 11:00–14:00, 16:00–22:00 Jun 7 19:00–21:00 Jun 8 08:00–13:00, 16:00–22:00 Jun 9 11:00–20:00 Jun 10 11:00–21:00 Jun 11 07:00–11:00, 13:00–21:00 Jun 12 04:00–23:00 Jun 13 08:00–09:00, 11:00–15:00, 17:00–22:00 Jun 14 20:00–21:00 Jun 15 07:00–14:00, 17:00–22:00 Jun 16 08:00–09:00, 11:00–23:00 Jun 17 10:00–12:00, 15:00–22:00 Jun 18 09:00–11:00, 13:00–14:00, 16:00–22:00 Jun 19 05:00–06:00, 10:00–11:00, 13:00–15:00, 18:00–20:00 Jun 20 15:00–18:00 Jun 21 18:00–22:00 Jun 22 15:00–20:00 Jun 23 12:00–15:00, 18:00–19:00 Jun 24 06:00–13:00, 15:00–21:00 Jun 25 06:00–10:00, 13:00–20:00 Jun 26 11:00–12:00, 17:00–20:00 Jun 27 19:00–20:00 Jun 28 19:00–22:00 Jun 29 08:00–09:00, 21:00–23:00 Jun 30 08:00–10:00, 12:00–13:00
July
Jul 1 16:00–22:00 Jul 2 09:00–10:00, 18:00–22:00 Jul 3 08:00–10:00, 16:00–20:00 Jul 4 08:00–11:00 Jul 7 09:00–12:00, 16:00–21:00 Jul 8 09:00–10:00, 20:00–22:00 Jul 9 08:00–11:00, 16:00–18:00, 20:00–22:00 Jul 10 09:00–11:00, 13:00–14:00, 19:00–23:00 Jul 13 19:00–21:00 Jul 14 10:00–11:00, 19:00–22:00 Jul 15 09:00–15:00, 18:00–21:00 Jul 16 09:00–22:00 Jul 17 09:00–16:00 Jul 19 06:00–10:00, 12:00–13:00, 18:00–22:00 Jul 20 13:00–21:00 Jul 24 14:00–15:00 Jul 25 06:00–10:00, 13:00–16:00, 19:00–21:00 Jul 26 07:00–10:00, 14:00–16:00 Jul 27 18:00–19:00 Jul 28 13:00–15:00 Jul 29 07:00–09:00, 19:00–22:00 Jul 30 06:00–09:00, 13:00–14:00 Jul 31 18:00–20:00
August
Aug 1 12:00–13:00, 18:00–22:00 Aug 2 20:00–21:00 Aug 3 09:00–10:00, 20:00–21:00 Aug 4 08:00–11:00 Aug 5 08:00–13:00, 16:00–18:00 Aug 6 06:00–13:00, 17:00–20:00 Aug 7 08:00–13:00, 18:00–21:00 Aug 8 10:00–11:00 Aug 10 13:00–15:00, 17:00–21:00 Aug 11 08:00–09:00 Aug 15 09:00–11:00, 19:00–20:00 Aug 16 11:00–19:00 Aug 17 20:00–22:00 Aug 18 06:00–20:00 Aug 20 07:00–09:00, 16:00–19:00 Aug 21 07:00–16:00, 18:00–20:00 Aug 22 09:00–20:00 Aug 23 08:00–13:00 Aug 24 02:00–03:00, 09:00–12:00, 19:00–21:00 Aug 27 12:00–13:00, 19:00–20:00 Aug 29 16:00–18:00, 20:00–21:00 Aug 30 05:00–06:00, 14:00–16:00, 19:00–20:00 Aug 31 13:00–20:00
September
Sep 1 07:00–19:00 Sep 2 09:00–21:00 Sep 3 08:00–21:00 Sep 4 08:00–10:00, 15:00–16:00 Sep 5 20:00–22:00 Sep 6 06:00–14:00, 18:00–22:00 Sep 7 09:00–10:00, 19:00–20:00 Sep 8 08:00–11:00, 13:00–16:00, 18:00–20:00 Sep 9 07:00–11:00, 13:00–21:00 Sep 10 08:00–09:00, 12:00–21:00 Sep 11 07:00–21:00 Sep 12 09:00–15:00, 20:00–21:00 Sep 13 09:00–15:00, 17:00–22:00 Sep 15 09:00–13:00, 15:00–20:00 Sep 16 08:00–23:00 Sep 17 09:00–21:00 Sep 18 11:00–13:00, 15:00–16:00, 18:00–21:00 Sep 19 19:00–20:00 Sep 20 11:00–12:00, 16:00–22:00 Sep 21 17:00–20:00 Sep 22 07:00–11:00, 13:00–15:00, 17:00–21:00 Sep 23 19:00–22:00 Sep 24 14:00–23:00 Sep 25 09:00–12:00, 19:00–20:00 Sep 26 07:00–10:00, 12:00–14:00, 17:00–19:00 Sep 27 07:00–11:00, 15:00–20:00 Sep 28 18:00–21:00 Sep 29 08:00–11:00, 13:00–14:00, 18:00–21:00 Sep 30 08:00–11:00, 16:00–20:00
October
Oct 1 07:00–09:00, 12:00–15:00, 18:00–21:00 Oct 2 06:00–08:00, 10:00–11:00, 18:00–20:00 Oct 3 06:00–07:00, 09:00–11:00, 18:00–19:00 Oct 4 14:00–15:00 Oct 5 20:00–23:00 Oct 6 14:00–16:00, 19:00–20:00 Oct 7 17:00–18:00 Oct 9 07:00–10:00, 12:00–18:00 Oct 10 08:00–20:00 Oct 11 11:00–14:00, 17:00–18:00 Oct 12 08:00–21:00 Oct 13 08:00–09:00, 11:00–12:00, 17:00–21:00 Oct 14 10:00–13:00, 15:00–21:00 Oct 15 09:00–10:00, 14:00–15:00, 18:00–22:00 Oct 16 15:00–24:00 Oct 17 14:00–23:00 Oct 18 14:00–24:00 Oct 19 10:00–13:00, 16:00–22:00 Oct 20 13:00–20:00 Oct 22 11:00–20:00 Oct 23 11:00–13:00, 18:00–20:00 Oct 24 20:00–22:00 Oct 25 18:00–20:00 Oct 26 18:00–21:00 Oct 27 15:00–20:00 Oct 28 13:00–14:00 Oct 29 17:00–22:00 Oct 30 08:00–13:00, 15:00–21:00 Oct 31 12:00–15:00
November
Nov 1 08:00–17:00, 19:00–20:00 Nov 2 09:00–16:00, 20:00–21:00 Nov 3 10:00–16:00, 19:00–21:00 Nov 4 17:00–20:00 Nov 5 09:00–11:00, 18:00–22:00 Nov 6 11:00–16:00 Nov 7 08:00–12:00 Nov 8 17:00–23:00 Nov 9 10:00–15:00 Nov 10 14:00–15:00 Nov 11 09:00–11:00, 16:00–18:00, 20:00–21:00 Nov 12 16:00–17:00, 19:00–23:00 Nov 13 20:00–22:00 Nov 20 16:00–17:00, 20:00–21:00 Nov 21 10:00–11:00 Nov 22 13:00–16:00, 20:00–23:00 Nov 24 10:00–12:00, 14:00–15:00, 18:00–19:00 Nov 25 11:00–21:00 Nov 26 18:00–19:00 Nov 27 10:00–12:00, 16:00–19:00, 21:00–23:00 Nov 28 09:00–12:00 Nov 29 08:00–10:00 Nov 30 08:00–10:00, 18:00–22:00
December
Dec 1 10:00–19:00 Dec 2 11:00–20:00, 22:00–24:00 Dec 3 10:00–13:00, 15:00–17:00, 19:00–22:00 Dec 4 12:00–21:00 Dec 5 10:00–21:00 Dec 6 08:00–11:00, 15:00–17:00, 21:00–24:00 Dec 7 00:00–01:00, 11:00–13:00, 15:00–17:00, 20:00–22:00 Dec 8 18:00–20:00 Dec 9 10:00–12:00, 18:00–22:00 Dec 10 09:00–11:00, 13:00–23:00 Dec 11 11:00–12:00, 21:00–22:00 Dec 12 12:00–13:00, 19:00–20:00 Dec 13 19:00–20:00 Dec 14 15:00–18:00, 20:00–21:00 Dec 15 10:00–13:00, 19:00–21:00 Dec 17 10:00–13:00, 19:00–22:00 Dec 18 12:00–13:00, 20:00–22:00 Dec 19 10:00–16:00, 18:00–24:00 Dec 20 08:00–09:00, 11:00–15:00, 17:00–23:00 Dec 21 10:00–13:00, 21:00–22:00 Dec 22 17:00–18:00 Dec 23 15:00–17:00, 19:00–21:00 Dec 24 16:00–17:00 Dec 26 17:00–19:00 Dec 27 09:00–13:00, 18:00–22:00 Dec 28 08:00–10:00, 13:00–22:00 Dec 29 09:00–10:00, 13:00–17:00, 19:00–22:00 Dec 30 09:00–13:00, 15:00–16:00, 18:00–22:00 Dec 31 09:00–10:00, 13:00–19:00