Most often in November, 30 days.
Highest follower count seen that year: 1,932.
July
Jul 26 03:00–06:00, 17:00–22:00 Jul 27 01:00–02:00, 08:00–09:00, 18:00–19:00, 21:00–22:00 Jul 28 07:00–08:00, 19:00–24:00 Jul 29 00:00–02:00, 09:00–11:00, 17:00–19:00, 21:00–24:00 Jul 30 04:00–05:00, 18:00–22:00 Jul 31 00:00–02:00, 07:00–12:00, 17:00–24:00
August
Aug 1 06:00–07:00, 17:00–24:00 Aug 2 00:00–02:00, 10:00–11:00, 23:00–24:00 Aug 3 00:00–07:00, 18:00–24:00 Aug 4 00:00–03:00, 12:00–13:00, 21:00–24:00 Aug 5 12:00–14:00, 23:00–24:00 Aug 6 01:00–04:00, 07:00–08:00, 18:00–24:00 Aug 7 00:00–07:00, 16:00–24:00 Aug 8 00:00–06:00 Aug 9 00:00–08:00, 19:00–24:00 Aug 10 18:00–24:00 Aug 11 01:00–04:00, 20:00–24:00 Aug 12 00:00–07:00, 19:00–24:00 Aug 14 01:00–07:00, 19:00–24:00 Aug 15 20:00–24:00 Aug 16 00:00–05:00, 10:00–15:00, 17:00–19:00, 21:00–23:00 Aug 17 07:00–08:00, 19:00–20:00 Aug 22 20:00–23:00 Aug 23 00:00–05:00, 14:00–17:00, 20:00–21:00 Aug 24 00:00–05:00, 13:00–14:00 Aug 25 06:00–07:00 Aug 26 06:00–07:00, 11:00–12:00 Aug 28 06:00–12:00 Aug 29 06:00–10:00, 23:00–24:00 Aug 30 00:00–04:00, 07:00–10:00, 21:00–23:00 Aug 31 00:00–02:00, 04:00–10:00, 19:00–24:00
September
Sep 1 00:00–03:00, 21:00–24:00 Sep 2 00:00–05:00, 21:00–23:00 Sep 3 01:00–03:00, 22:00–24:00 Sep 4 00:00–04:00, 22:00–23:00 Sep 5 00:00–01:00, 03:00–04:00, 22:00–24:00 Sep 6 00:00–02:00, 06:00–10:00, 20:00–23:00 Sep 7 00:00–03:00, 12:00–14:00, 17:00–18:00, 21:00–23:00 Sep 9 00:00–01:00 Sep 12 21:00–24:00 Sep 13 07:00–12:00, 18:00–24:00 Sep 14 00:00–09:00, 17:00–18:00, 21:00–23:00 Sep 15 00:00–03:00, 22:00–24:00 Sep 16 00:00–05:00, 21:00–24:00 Sep 17 03:00–04:00, 21:00–24:00 Sep 18 02:00–04:00, 22:00–24:00 Sep 19 00:00–01:00, 04:00–05:00, 22:00–24:00 Sep 20 01:00–05:00, 07:00–08:00, 13:00–14:00, 16:00–23:00 Sep 21 01:00–03:00, 11:00–12:00, 16:00–17:00 Sep 22 00:00–04:00, 21:00–24:00 Sep 23 00:00–05:00 Sep 24 01:00–05:00, 22:00–24:00 Sep 25 00:00–05:00, 23:00–24:00 Sep 26 04:00–05:00, 21:00–24:00 Sep 27 00:00–04:00, 19:00–24:00 Sep 28 00:00–05:00, 07:00–08:00, 10:00–11:00, 16:00–18:00 Sep 29 17:00–19:00, 21:00–22:00 Sep 30 15:00–21:00
October
Oct 1 18:00–19:00 Oct 3 14:00–19:00, 21:00–22:00 Oct 4 00:00–01:00, 06:00–07:00, 17:00–21:00 Oct 5 02:00–03:00, 10:00–11:00, 19:00–22:00 Oct 6 16:00–20:00 Oct 7 17:00–21:00 Oct 8 18:00–20:00 Oct 9 15:00–17:00, 19:00–20:00 Oct 10 13:00–16:00, 19:00–20:00, 22:00–23:00 Oct 11 01:00–02:00, 17:00–22:00 Oct 12 02:00–04:00, 19:00–20:00, 23:00–24:00 Oct 13 01:00–04:00, 22:00–23:00 Oct 14 02:00–03:00, 21:00–23:00 Oct 15 00:00–03:00 Oct 16 01:00–05:00, 23:00–24:00 Oct 17 00:00–03:00, 22:00–24:00 Oct 18 00:00–03:00, 22:00–24:00 Oct 19 01:00–02:00, 10:00–11:00 Oct 20 06:00–10:00 Oct 21 06:00–12:00 Oct 22 07:00–11:00 Oct 23 05:00–10:00 Oct 24 07:00–12:00 Oct 25 01:00–03:00, 08:00–09:00, 21:00–24:00 Oct 26 01:00–05:00, 19:00–20:00 Oct 27 02:00–03:00, 23:00–24:00 Oct 28 00:00–03:00 Oct 29 00:00–02:00, 04:00–05:00, 23:00–24:00 Oct 30 00:00–02:00, 23:00–24:00
November
Nov 1 00:00–06:00, 15:00–18:00 Nov 2 03:00–04:00, 20:00–22:00 Nov 3 17:00–18:00, 21:00–22:00 Nov 4 14:00–20:00, 22:00–23:00 Nov 5 15:00–18:00, 22:00–23:00 Nov 6 15:00–20:00, 22:00–23:00 Nov 7 21:00–24:00 Nov 8 01:00–03:00, 08:00–09:00, 23:00–24:00 Nov 9 00:00–01:00, 04:00–06:00, 09:00–10:00 Nov 10 07:00–10:00, 12:00–13:00 Nov 11 06:00–12:00 Nov 12 07:00–10:00 Nov 13 07:00–11:00 Nov 14 05:00–10:00, 13:00–14:00, 22:00–24:00 Nov 15 02:00–03:00, 05:00–06:00, 21:00–23:00 Nov 16 02:00–03:00, 19:00–20:00 Nov 17 00:00–03:00 Nov 18 00:00–04:00, 23:00–24:00 Nov 19 00:00–05:00, 23:00–24:00 Nov 20 00:00–01:00, 04:00–05:00, 23:00–24:00 Nov 21 00:00–01:00, 03:00–06:00 Nov 22 00:00–04:00, 21:00–22:00 Nov 23 02:00–04:00, 16:00–20:00 Nov 24 16:00–22:00 Nov 25 16:00–20:00, 22:00–23:00 Nov 26 18:00–20:00, 22:00–23:00 Nov 27 15:00–17:00, 20:00–21:00 Nov 28 15:00–17:00, 19:00–21:00, 23:00–24:00 Nov 29 04:00–05:00, 16:00–21:00 Nov 30 00:00–06:00, 09:00–10:00
December
Dec 1 08:00–11:00 Dec 2 07:00–13:00 Dec 3 06:00–10:00 Dec 4 08:00–14:00 Dec 5 07:00–09:00 Dec 8 01:00–02:00, 04:00–05:00, 22:00–23:00 Dec 9 02:00–03:00, 22:00–24:00 Dec 10 00:00–02:00, 23:00–24:00 Dec 11 00:00–05:00, 23:00–24:00 Dec 12 00:00–05:00, 23:00–24:00 Dec 13 00:00–03:00, 19:00–23:00 Dec 14 02:00–04:00, 13:00–19:00, 22:00–23:00 Dec 15 15:00–17:00, 22:00–23:00 Dec 16 14:00–18:00, 22:00–23:00 Dec 17 15:00–22:00 Dec 18 16:00–19:00, 21:00–22:00 Dec 19 08:00–12:00, 23:00–24:00 Dec 20 00:00–01:00, 03:00–04:00, 08:00–12:00 Dec 21 01:00–06:00, 20:00–23:00 Dec 22 00:00–02:00, 04:00–06:00 Dec 23 00:00–07:00, 21:00–24:00 Dec 24 01:00–03:00, 08:00–09:00, 23:00–24:00 Dec 25 00:00–01:00, 05:00–07:00 Dec 26 04:00–05:00, 07:00–08:00, 12:00–13:00, 17:00–19:00 Dec 27 10:00–13:00, 23:00–24:00 Dec 28 00:00–01:00, 03:00–04:00 Dec 29 01:00–03:00, 07:00–08:00, 20:00–23:00 Dec 30 00:00–04:00, 16:00–18:00, 22:00–23:00 Dec 31 01:00–02:00, 06:00–07:00