Most often in November, 30 days.
Highest follower count seen that year: 838.
August
Aug 2 18:00–19:00 Aug 3 00:00–01:00, 06:00–11:00, 22:00–23:00 Aug 4 04:00–06:00 Aug 24 20:00–22:00 Aug 25 20:00–21:00 Aug 26 23:00–24:00 Aug 28 22:00–23:00 Aug 29 05:00–07:00 Aug 30 06:00–13:00 Aug 31 00:00–01:00, 08:00–10:00, 16:00–20:00
September
Sep 1 04:00–06:00, 20:00–21:00, 23:00–24:00 Sep 2 13:00–14:00, 20:00–24:00 Sep 3 04:00–06:00, 23:00–24:00 Sep 4 04:00–06:00, 18:00–24:00 Sep 5 04:00–06:00, 22:00–24:00 Sep 6 15:00–22:00 Sep 7 00:00–01:00, 17:00–20:00, 22:00–24:00 Sep 8 21:00–24:00 Sep 9 04:00–06:00, 20:00–24:00 Sep 10 06:00–07:00, 12:00–14:00, 18:00–24:00 Sep 12 04:00–07:00, 13:00–14:00, 22:00–24:00 Sep 13 05:00–11:00, 13:00–21:00 Sep 14 20:00–23:00 Sep 15 04:00–06:00, 20:00–24:00 Sep 16 05:00–06:00, 13:00–14:00, 19:00–23:00 Sep 17 12:00–14:00, 19:00–24:00 Sep 18 04:00–06:00, 13:00–14:00, 21:00–22:00 Sep 19 04:00–06:00, 13:00–14:00, 19:00–24:00 Sep 20 05:00–16:00, 19:00–24:00 Sep 21 04:00–06:00 Sep 22 18:00–19:00, 21:00–24:00 Sep 23 04:00–07:00, 13:00–14:00, 22:00–24:00 Sep 24 04:00–07:00 Sep 25 13:00–14:00, 18:00–20:00 Sep 26 04:00–07:00, 12:00–14:00 Sep 27 19:00–24:00 Sep 28 05:00–07:00, 19:00–24:00 Sep 29 04:00–07:00, 22:00–24:00 Sep 30 04:00–07:00, 13:00–14:00, 21:00–22:00
October
Oct 1 04:00–07:00, 13:00–14:00, 20:00–23:00 Oct 2 21:00–23:00 Oct 3 04:00–07:00, 12:00–14:00 Oct 4 20:00–21:00, 23:00–24:00 Oct 5 00:00–01:00 Oct 7 20:00–23:00 Oct 8 13:00–14:00 Oct 10 13:00–14:00, 22:00–24:00 Oct 11 00:00–01:00, 19:00–20:00, 22:00–24:00 Oct 12 04:00–06:00, 19:00–24:00 Oct 13 04:00–07:00, 22:00–23:00 Oct 14 04:00–07:00, 13:00–14:00, 21:00–22:00 Oct 15 05:00–07:00, 13:00–14:00, 18:00–19:00, 21:00–23:00 Oct 16 04:00–07:00, 12:00–14:00 Oct 20 20:00–24:00 Oct 21 13:00–14:00, 20:00–23:00 Oct 22 04:00–06:00, 13:00–14:00 Oct 23 04:00–07:00, 12:00–14:00, 17:00–21:00 Oct 24 05:00–07:00, 13:00–14:00 Oct 25 00:00–01:00, 07:00–11:00, 23:00–24:00 Oct 26 00:00–01:00, 05:00–07:00, 19:00–24:00 Oct 27 00:00–01:00, 05:00–08:00 Oct 28 14:00–15:00, 21:00–24:00 Oct 29 05:00–08:00, 14:00–15:00 Oct 30 05:00–08:00, 20:00–24:00 Oct 31 05:00–08:00, 13:00–15:00
November
Nov 1 00:00–01:00, 06:00–14:00, 18:00–20:00, 23:00–24:00 Nov 2 00:00–01:00, 06:00–08:00, 23:00–24:00 Nov 3 00:00–02:00, 05:00–08:00, 19:00–24:00 Nov 4 00:00–01:00, 05:00–08:00, 14:00–15:00, 21:00–22:00 Nov 5 06:00–08:00, 14:00–15:00, 20:00–24:00 Nov 6 05:00–08:00, 13:00–15:00 Nov 7 05:00–08:00, 14:00–15:00 Nov 8 10:00–12:00, 19:00–20:00, 23:00–24:00 Nov 9 00:00–01:00, 06:00–07:00, 22:00–24:00 Nov 10 00:00–01:00, 05:00–08:00, 21:00–24:00 Nov 11 00:00–01:00, 05:00–08:00, 14:00–15:00, 21:00–23:00 Nov 12 05:00–08:00, 21:00–24:00 Nov 13 00:00–01:00, 05:00–08:00, 14:00–15:00, 18:00–19:00, 22:00–23:00 Nov 14 07:00–08:00 Nov 15 23:00–24:00 Nov 16 00:00–01:00, 22:00–24:00 Nov 17 00:00–01:00, 05:00–08:00 Nov 18 05:00–08:00, 14:00–15:00, 21:00–22:00 Nov 19 00:00–01:00, 05:00–08:00, 14:00–15:00, 21:00–24:00 Nov 20 00:00–02:00, 05:00–08:00, 14:00–15:00 Nov 21 05:00–08:00, 22:00–24:00 Nov 22 00:00–02:00, 12:00–14:00, 18:00–22:00 Nov 23 07:00–08:00, 20:00–24:00 Nov 24 05:00–07:00, 20:00–21:00, 23:00–24:00 Nov 25 05:00–06:00, 14:00–15:00, 22:00–24:00 Nov 26 05:00–08:00, 13:00–15:00, 22:00–24:00 Nov 27 06:00–08:00, 13:00–15:00, 21:00–23:00 Nov 28 06:00–08:00, 14:00–15:00, 21:00–24:00 Nov 29 22:00–23:00 Nov 30 20:00–24:00
December
Dec 1 00:00–01:00, 05:00–08:00, 23:00–24:00 Dec 2 00:00–01:00, 05:00–08:00, 14:00–15:00, 22:00–23:00 Dec 3 05:00–07:00, 14:00–15:00, 23:00–24:00 Dec 4 05:00–08:00, 14:00–15:00 Dec 5 06:00–08:00, 14:00–15:00 Dec 6 00:00–01:00, 14:00–24:00 Dec 7 23:00–24:00 Dec 8 00:00–01:00, 21:00–22:00 Dec 9 05:00–08:00, 21:00–23:00 Dec 10 23:00–24:00 Dec 11 00:00–01:00, 14:00–15:00, 22:00–23:00 Dec 12 00:00–01:00, 14:00–15:00 Dec 15 20:00–23:00 Dec 16 06:00–07:00, 14:00–15:00, 22:00–24:00 Dec 17 05:00–08:00, 14:00–15:00, 21:00–22:00 Dec 18 05:00–08:00, 14:00–15:00, 22:00–24:00 Dec 20 00:00–02:00, 21:00–23:00 Dec 21 00:00–01:00, 05:00–06:00 Dec 22 05:00–08:00 Dec 23 06:00–08:00, 14:00–15:00 Dec 24 05:00–08:00, 19:00–24:00 Dec 25 00:00–01:00, 15:00–17:00, 20:00–24:00 Dec 26 00:00–01:00, 09:00–11:00, 14:00–20:00, 22:00–23:00 Dec 27 09:00–11:00, 15:00–20:00, 22:00–24:00 Dec 28 00:00–01:00, 09:00–12:00, 15:00–20:00, 23:00–24:00 Dec 29 00:00–01:00, 07:00–08:00, 22:00–24:00 Dec 30 00:00–01:00, 06:00–08:00, 14:00–15:00, 23:00–24:00 Dec 31 00:00–01:00, 05:00–08:00, 16:00–24:00