Most often in October, 26 days.
Highest follower count seen that year: 1,524.
June
Jun 11 14:00–19:00 Jun 12 04:00–09:00, 11:00–19:00 Jun 13 05:00–09:00, 12:00–19:00 Jun 14 05:00–09:00 Jun 17 05:00–10:00, 15:00–20:00 Jun 18 07:00–08:00, 13:00–18:00 Jun 19 05:00–08:00, 12:00–19:00 Jun 20 05:00–09:00, 13:00–19:00 Jun 21 06:00–09:00, 12:00–14:00 Jun 23 04:00–08:00, 12:00–18:00 Jun 24 06:00–09:00, 16:00–19:00 Jun 25 07:00–09:00 Jun 27 07:00–09:00 Jun 30 14:00–17:00
July
Jul 1 05:00–12:00, 15:00–18:00 Jul 2 05:00–09:00, 11:00–13:00 Jul 3 05:00–12:00, 15:00–19:00 Jul 4 05:00–13:00, 15:00–17:00 Jul 8 08:00–17:00 Jul 9 05:00–17:00 Jul 10 06:00–18:00 Jul 11 06:00–09:00, 11:00–19:00 Jul 12 06:00–19:00 Jul 13 05:00–10:00 Jul 14 05:00–07:00, 11:00–15:00, 17:00–19:00 Jul 15 04:00–19:00 Jul 16 04:00–09:00, 11:00–18:00 Jul 17 04:00–19:00 Jul 18 05:00–20:00 Jul 19 05:00–09:00, 12:00–18:00 Jul 20 04:00–08:00, 10:00–17:00 Jul 21 05:00–08:00, 10:00–12:00 Jul 26 09:00–12:00, 16:00–21:00 Jul 27 05:00–13:00, 15:00–19:00 Jul 28 05:00–12:00, 17:00–19:00 Jul 29 05:00–09:00, 11:00–13:00, 16:00–20:00 Jul 30 06:00–19:00 Jul 31 07:00–09:00, 11:00–16:00
August
Aug 1 05:00–09:00, 11:00–17:00 Aug 2 07:00–11:00 Aug 4 07:00–19:00 Aug 5 07:00–11:00, 14:00–20:00 Aug 6 06:00–12:00, 15:00–19:00 Aug 7 06:00–11:00 Aug 8 14:00–20:00 Aug 9 04:00–16:00 Aug 10 05:00–10:00, 13:00–19:00 Aug 11 05:00–09:00, 14:00–17:00 Aug 12 06:00–08:00 Aug 13 08:00–11:00, 14:00–16:00 Aug 14 05:00–07:00, 13:00–18:00 Aug 21 07:00–09:00, 14:00–16:00 Aug 22 04:00–09:00, 11:00–12:00, 15:00–16:00 Aug 23 06:00–09:00, 14:00–16:00 Aug 25 04:00–06:00, 08:00–09:00, 15:00–18:00 Aug 26 05:00–08:00, 10:00–11:00, 15:00–17:00, 19:00–22:00 Aug 27 05:00–08:00, 12:00–20:00 Aug 28 05:00–07:00, 12:00–21:00 Aug 29 06:00–08:00, 17:00–21:00 Aug 30 06:00–09:00, 11:00–15:00, 17:00–20:00
September
Sep 1 05:00–08:00, 12:00–19:00 Sep 2 06:00–08:00, 11:00–17:00, 19:00–22:00 Sep 3 05:00–10:00, 15:00–21:00 Sep 4 04:00–11:00, 18:00–20:00 Sep 5 05:00–10:00, 15:00–19:00 Sep 6 05:00–09:00, 15:00–18:00 Sep 8 05:00–10:00, 15:00–20:00 Sep 9 05:00–07:00, 11:00–22:00 Sep 10 05:00–07:00, 12:00–19:00 Sep 11 05:00–07:00, 12:00–21:00 Sep 12 06:00–07:00, 12:00–20:00 Sep 13 04:00–07:00, 12:00–24:00 Sep 15 06:00–07:00, 12:00–13:00, 15:00–20:00 Sep 16 03:00–07:00, 12:00–24:00 Sep 17 05:00–11:00 Sep 18 06:00–07:00, 15:00–24:00 Sep 19 00:00–01:00, 06:00–07:00, 12:00–14:00, 17:00–18:00 Sep 20 02:00–07:00, 12:00–15:00 Sep 22 06:00–07:00, 11:00–22:00 Sep 23 01:00–13:00, 17:00–23:00 Sep 24 05:00–09:00, 11:00–15:00, 17:00–24:00 Sep 25 05:00–08:00, 10:00–21:00 Sep 26 06:00–11:00, 15:00–22:00 Sep 27 09:00–20:00 Sep 29 07:00–12:00, 17:00–19:00 Sep 30 04:00–10:00, 13:00–16:00
October
Oct 1 05:00–16:00, 18:00–21:00 Oct 2 08:00–24:00 Oct 3 07:00–12:00, 14:00–22:00 Oct 4 05:00–09:00, 12:00–19:00 Oct 6 07:00–13:00, 15:00–21:00 Oct 7 06:00–12:00, 16:00–23:00 Oct 8 04:00–09:00, 16:00–22:00 Oct 9 06:00–09:00, 13:00–23:00 Oct 10 08:00–22:00 Oct 11 06:00–15:00, 17:00–22:00 Oct 13 04:00–10:00, 15:00–16:00, 18:00–21:00 Oct 14 08:00–23:00 Oct 15 07:00–15:00, 17:00–23:00 Oct 16 05:00–09:00, 12:00–22:00 Oct 17 05:00–13:00 Oct 20 09:00–22:00 Oct 21 03:00–09:00, 13:00–23:00 Oct 22 05:00–10:00, 12:00–13:00, 16:00–23:00 Oct 23 06:00–12:00, 16:00–20:00 Oct 24 07:00–13:00, 15:00–19:00 Oct 25 10:00–15:00, 17:00–22:00 Oct 27 04:00–13:00 Oct 28 06:00–23:00 Oct 29 06:00–10:00, 13:00–21:00 Oct 30 05:00–09:00, 14:00–23:00 Oct 31 06:00–10:00, 14:00–21:00
November
Nov 4 06:00–23:00 Nov 5 10:00–12:00 Nov 6 05:00–10:00, 15:00–21:00 Nov 7 05:00–09:00, 14:00–21:00 Nov 8 04:00–12:00 Nov 10 05:00–11:00, 15:00–21:00 Nov 11 05:00–11:00 Nov 12 09:00–22:00 Nov 13 05:00–11:00, 13:00–15:00 Nov 14 05:00–09:00, 11:00–12:00, 19:00–20:00 Nov 24 07:00–09:00, 11:00–14:00 Nov 25 07:00–08:00, 15:00–16:00, 19:00–23:00 Nov 26 06:00–07:00, 10:00–12:00, 17:00–22:00 Nov 27 16:00–22:00 Nov 28 06:00–09:00, 17:00–23:00 Nov 29 09:00–10:00
December
Dec 1 05:00–08:00, 17:00–23:00 Dec 2 10:00–21:00 Dec 3 07:00–08:00, 14:00–24:00 Dec 4 12:00–15:00, 17:00–23:00 Dec 5 11:00–19:00 Dec 6 08:00–14:00 Dec 8 04:00–09:00, 13:00–20:00 Dec 9 06:00–09:00, 13:00–14:00 Dec 10 06:00–07:00 Dec 11 05:00–06:00, 11:00–21:00 Dec 12 08:00–09:00, 18:00–21:00 Dec 13 12:00–20:00 Dec 15 05:00–07:00, 17:00–19:00 Dec 16 17:00–20:00 Dec 17 05:00–09:00 Dec 18 13:00–16:00, 18:00–19:00 Dec 19 09:00–16:00, 18:00–22:00 Dec 20 08:00–12:00, 17:00–18:00 Dec 21 10:00–16:00, 18:00–21:00 Dec 22 09:00–12:00 Dec 24 04:00–12:00