Most often in November, 29 days.
Highest follower count seen that year: 5,826.
July
Jul 25 00:00–04:00, 07:00–08:00 Jul 26 10:00–11:00, 15:00–16:00, 21:00–23:00 Jul 27 11:00–12:00, 23:00–24:00 Jul 28 00:00–02:00, 14:00–15:00, 17:00–20:00 Jul 29 11:00–14:00 Jul 30 01:00–02:00, 09:00–13:00 Jul 31 00:00–01:00, 04:00–06:00, 09:00–13:00
August
Aug 1 08:00–09:00 Aug 3 10:00–11:00, 23:00–24:00 Aug 4 00:00–02:00, 12:00–14:00 Aug 6 05:00–07:00, 09:00–12:00 Aug 7 07:00–09:00 Aug 8 00:00–01:00, 09:00–13:00 Aug 9 11:00–14:00 Aug 10 11:00–15:00, 17:00–21:00 Aug 11 06:00–11:00 Aug 12 09:00–10:00 Aug 14 12:00–15:00 Aug 15 03:00–10:00, 14:00–17:00 Aug 16 02:00–03:00, 05:00–07:00, 12:00–14:00, 16:00–24:00 Aug 17 15:00–19:00, 21:00–22:00 Aug 18 05:00–07:00, 14:00–16:00 Aug 19 00:00–02:00, 05:00–14:00 Aug 20 06:00–12:00 Aug 21 00:00–03:00, 05:00–09:00, 14:00–15:00 Aug 22 01:00–08:00 Aug 25 02:00–03:00 Aug 26 01:00–02:00, 11:00–13:00 Aug 27 10:00–11:00 Aug 28 00:00–02:00, 05:00–07:00, 12:00–16:00 Aug 29 00:00–02:00, 04:00–07:00 Aug 30 00:00–03:00, 09:00–12:00 Aug 31 09:00–12:00
September
Sep 1 03:00–06:00, 08:00–15:00 Sep 2 07:00–11:00 Sep 3 02:00–04:00 Sep 4 07:00–11:00 Sep 5 07:00–11:00, 15:00–17:00 Sep 8 09:00–11:00 Sep 9 14:00–20:00 Sep 10 06:00–11:00, 15:00–19:00 Sep 11 07:00–12:00 Sep 12 00:00–04:00, 08:00–11:00 Sep 13 13:00–16:00 Sep 14 08:00–09:00, 11:00–13:00, 16:00–19:00 Sep 15 13:00–16:00 Sep 16 05:00–14:00 Sep 17 09:00–18:00 Sep 18 07:00–10:00 Sep 19 03:00–04:00, 16:00–20:00 Sep 20 03:00–04:00, 07:00–10:00, 18:00–19:00 Sep 21 11:00–12:00, 16:00–19:00 Sep 22 06:00–09:00, 15:00–16:00 Sep 23 14:00–16:00 Sep 24 06:00–10:00 Sep 25 05:00–10:00, 16:00–17:00 Sep 26 11:00–16:00, 18:00–19:00 Sep 27 15:00–20:00 Sep 28 11:00–14:00 Sep 29 05:00–06:00, 09:00–10:00, 12:00–15:00 Sep 30 00:00–01:00, 05:00–11:00, 21:00–23:00
October
Oct 1 09:00–17:00 Oct 2 02:00–03:00, 05:00–11:00 Oct 3 09:00–12:00, 15:00–16:00 Oct 4 16:00–21:00 Oct 6 11:00–12:00, 14:00–15:00 Oct 7 15:00–18:00 Oct 8 09:00–12:00 Oct 10 07:00–13:00 Oct 11 03:00–05:00, 07:00–18:00 Oct 12 07:00–09:00, 12:00–16:00 Oct 13 03:00–05:00 Oct 14 00:00–03:00, 08:00–10:00, 14:00–16:00 Oct 15 00:00–02:00, 07:00–08:00 Oct 16 01:00–03:00, 05:00–12:00 Oct 17 10:00–15:00, 22:00–24:00 Oct 18 00:00–01:00, 22:00–24:00 Oct 19 18:00–21:00 Oct 20 05:00–11:00, 23:00–24:00 Oct 21 23:00–24:00 Oct 22 00:00–02:00, 08:00–11:00, 13:00–14:00, 22:00–23:00 Oct 23 06:00–09:00, 20:00–21:00 Oct 24 05:00–07:00, 10:00–11:00, 14:00–15:00, 22:00–23:00 Oct 25 11:00–12:00, 21:00–24:00 Oct 26 09:00–10:00, 14:00–16:00, 22:00–24:00 Oct 27 00:00–01:00, 03:00–05:00, 08:00–09:00, 11:00–12:00 Oct 29 15:00–17:00, 23:00–24:00 Oct 30 00:00–02:00, 23:00–24:00 Oct 31 00:00–03:00, 10:00–13:00
November
Nov 1 01:00–02:00, 07:00–10:00 Nov 2 19:00–24:00 Nov 3 00:00–02:00, 09:00–14:00, 21:00–24:00 Nov 4 00:00–02:00, 06:00–13:00, 22:00–23:00 Nov 5 01:00–02:00, 11:00–14:00, 17:00–18:00 Nov 6 09:00–13:00, 23:00–24:00 Nov 7 07:00–08:00 Nov 8 06:00–13:00, 22:00–24:00 Nov 9 06:00–09:00, 20:00–24:00 Nov 10 00:00–01:00, 08:00–10:00, 13:00–14:00, 23:00–24:00 Nov 11 00:00–01:00, 21:00–23:00 Nov 12 02:00–04:00, 12:00–15:00, 23:00–24:00 Nov 13 02:00–06:00, 23:00–24:00 Nov 14 00:00–01:00 Nov 15 00:00–01:00 Nov 16 22:00–24:00 Nov 17 00:00–01:00, 23:00–24:00 Nov 18 00:00–01:00, 23:00–24:00 Nov 19 00:00–02:00 Nov 21 01:00–02:00 Nov 22 00:00–02:00, 21:00–24:00 Nov 23 00:00–03:00, 12:00–13:00 Nov 24 10:00–13:00 Nov 25 00:00–01:00, 09:00–15:00 Nov 26 02:00–03:00, 05:00–07:00, 11:00–12:00, 23:00–24:00 Nov 27 09:00–12:00 Nov 28 06:00–10:00, 22:00–24:00 Nov 29 00:00–02:00, 09:00–10:00 Nov 30 10:00–14:00, 21:00–24:00
December
Dec 1 08:00–10:00 Dec 3 00:00–01:00, 08:00–12:00 Dec 4 09:00–13:00 Dec 5 00:00–03:00, 06:00–08:00, 14:00–16:00, 18:00–21:00, 23:00–24:00 Dec 6 11:00–15:00 Dec 7 02:00–04:00, 13:00–14:00, 16:00–17:00 Dec 8 00:00–03:00, 12:00–15:00 Dec 9 03:00–04:00, 23:00–24:00 Dec 10 00:00–03:00, 09:00–10:00 Dec 11 10:00–12:00, 23:00–24:00 Dec 12 00:00–02:00, 10:00–12:00, 23:00–24:00 Dec 13 00:00–02:00, 23:00–24:00 Dec 14 00:00–01:00, 12:00–13:00, 21:00–22:00 Dec 15 00:00–01:00, 09:00–15:00, 23:00–24:00 Dec 16 00:00–01:00, 10:00–13:00, 22:00–24:00 Dec 17 00:00–02:00, 07:00–08:00 Dec 18 06:00–09:00, 21:00–24:00 Dec 20 02:00–03:00 Dec 22 09:00–10:00 Dec 23 07:00–08:00, 10:00–12:00, 22:00–24:00 Dec 24 00:00–03:00, 22:00–23:00 Dec 25 00:00–02:00, 09:00–10:00, 13:00–15:00, 22:00–23:00 Dec 26 00:00–01:00, 04:00–05:00 Dec 27 00:00–02:00, 08:00–12:00 Dec 28 01:00–02:00, 10:00–14:00 Dec 29 02:00–03:00, 10:00–11:00, 22:00–23:00 Dec 30 01:00–04:00, 23:00–24:00 Dec 31 00:00–03:00