Most often in October, 31 days.
Highest follower count seen that year: 4,164.
May
May 19 08:00–12:00, 23:00–24:00 May 20 00:00–02:00, 05:00–13:00, 21:00–24:00 May 21 06:00–13:00 May 22 08:00–13:00, 21:00–23:00 May 23 20:00–23:00 May 24 07:00–14:00, 22:00–24:00 May 25 00:00–05:00 May 26 06:00–13:00, 22:00–24:00 May 27 00:00–02:00, 06:00–11:00, 21:00–24:00 May 28 00:00–03:00, 07:00–13:00 May 29 00:00–02:00, 07:00–12:00 May 30 21:00–22:00 May 31 01:00–02:00
June
Jun 1 07:00–11:00 Jun 2 06:00–12:00 Jun 3 06:00–14:00 Jun 4 06:00–14:00 Jun 5 07:00–11:00 Jun 6 00:00–04:00, 08:00–11:00 Jun 7 01:00–03:00, 20:00–24:00 Jun 8 01:00–07:00, 22:00–24:00 Jun 9 19:00–24:00 Jun 10 02:00–04:00, 20:00–23:00 Jun 11 04:00–06:00, 20:00–24:00 Jun 12 00:00–05:00, 20:00–24:00 Jun 13 02:00–05:00, 21:00–22:00 Jun 14 22:00–24:00 Jun 15 00:00–05:00 Jun 16 20:00–24:00 Jun 17 02:00–05:00, 21:00–24:00 Jun 18 00:00–02:00, 21:00–24:00 Jun 19 04:00–06:00, 21:00–24:00 Jun 20 00:00–03:00, 21:00–24:00 Jun 21 02:00–05:00, 21:00–24:00 Jun 22 02:00–04:00 Jun 23 21:00–24:00 Jun 24 00:00–04:00, 21:00–24:00 Jun 25 02:00–05:00, 21:00–24:00 Jun 26 02:00–05:00, 21:00–24:00 Jun 27 02:00–05:00, 22:00–24:00 Jun 28 02:00–03:00, 22:00–24:00 Jun 30 00:00–02:00
July
Jul 1 21:00–24:00 Jul 2 00:00–06:00, 21:00–24:00 Jul 3 00:00–05:00, 21:00–24:00 Jul 4 02:00–05:00, 22:00–24:00 Jul 5 00:00–05:00, 23:00–24:00 Jul 6 00:00–05:00 Jul 7 21:00–24:00 Jul 8 02:00–05:00, 22:00–24:00 Jul 9 00:00–01:00, 04:00–08:00, 21:00–24:00 Jul 10 02:00–04:00, 23:00–24:00 Jul 11 02:00–06:00, 21:00–24:00 Jul 12 00:00–05:00, 23:00–24:00 Jul 13 00:00–01:00 Jul 14 23:00–24:00 Jul 15 00:00–02:00, 22:00–24:00 Jul 16 02:00–06:00 Jul 17 02:00–09:00, 23:00–24:00 Jul 18 00:00–06:00 Jul 19 00:00–06:00, 21:00–24:00 Jul 21 05:00–09:00, 23:00–24:00 Jul 22 00:00–05:00, 23:00–24:00 Jul 23 00:00–06:00, 22:00–24:00 Jul 24 00:00–06:00, 22:00–24:00 Jul 25 00:00–02:00, 05:00–09:00, 23:00–24:00 Jul 26 00:00–06:00, 23:00–24:00 Jul 27 00:00–02:00 Jul 29 06:00–09:00, 22:00–24:00 Jul 30 02:00–07:00, 22:00–24:00 Jul 31 00:00–05:00, 22:00–24:00
August
Aug 1 00:00–01:00, 23:00–24:00 Aug 2 00:00–05:00 Aug 3 00:00–02:00 Aug 4 02:00–06:00, 22:00–24:00 Aug 5 23:00–24:00 Aug 6 00:00–01:00, 22:00–24:00 Aug 7 00:00–04:00, 22:00–24:00 Aug 8 00:00–07:00, 23:00–24:00 Aug 9 00:00–06:00, 23:00–24:00 Aug 10 00:00–06:00 Aug 11 22:00–24:00 Aug 12 00:00–04:00, 22:00–24:00 Aug 13 23:00–24:00 Aug 14 00:00–05:00, 21:00–23:00 Aug 15 04:00–09:00, 23:00–24:00 Aug 16 00:00–06:00, 23:00–24:00 Aug 17 00:00–05:00 Aug 18 22:00–24:00 Aug 19 00:00–05:00 Aug 20 22:00–24:00 Aug 21 03:00–06:00, 22:00–24:00 Aug 22 22:00–24:00 Aug 23 00:00–04:00, 22:00–24:00 Aug 24 00:00–01:00, 21:00–24:00 Aug 25 22:00–24:00 Aug 26 00:00–02:00, 22:00–24:00 Aug 27 00:00–06:00, 22:00–24:00 Aug 28 00:00–06:00, 22:00–24:00 Aug 29 00:00–01:00, 22:00–24:00 Aug 30 00:00–05:00
September
Sep 1 06:00–10:00, 22:00–24:00 Sep 2 00:00–06:00, 23:00–24:00 Sep 3 00:00–06:00, 22:00–24:00 Sep 4 00:00–02:00, 22:00–24:00 Sep 5 02:00–04:00, 23:00–24:00 Sep 6 00:00–03:00 Sep 7 00:00–02:00, 04:00–06:00, 22:00–24:00 Sep 8 23:00–24:00 Sep 9 01:00–02:00, 04:00–06:00, 22:00–24:00 Sep 10 00:00–06:00, 22:00–24:00 Sep 11 00:00–06:00, 22:00–24:00 Sep 12 00:00–06:00, 22:00–24:00 Sep 13 03:00–08:00, 23:00–24:00 Sep 14 00:00–05:00 Sep 15 23:00–24:00 Sep 16 00:00–04:00 Sep 17 00:00–09:00, 23:00–24:00 Sep 18 00:00–05:00, 23:00–24:00 Sep 19 00:00–01:00, 04:00–07:00, 23:00–24:00 Sep 20 00:00–07:00, 23:00–24:00 Sep 21 00:00–04:00, 22:00–24:00 Sep 22 03:00–05:00, 22:00–24:00 Sep 23 00:00–04:00, 06:00–07:00 Sep 24 01:00–07:00 Sep 26 23:00–24:00 Sep 27 00:00–01:00, 03:00–04:00, 23:00–24:00 Sep 28 00:00–05:00 Sep 29 04:00–07:00, 23:00–24:00 Sep 30 00:00–05:00, 23:00–24:00
October
Oct 1 03:00–06:00 Oct 2 00:00–09:00 Oct 3 00:00–04:00 Oct 4 00:00–07:00 Oct 5 01:00–09:00 Oct 6 01:00–03:00 Oct 7 00:00–09:00 Oct 8 00:00–06:00, 09:00–10:00 Oct 9 00:00–02:00, 04:00–08:00, 23:00–24:00 Oct 10 00:00–09:00, 23:00–24:00 Oct 11 00:00–08:00 Oct 12 00:00–05:00, 21:00–24:00 Oct 13 00:00–01:00, 03:00–06:00 Oct 14 00:00–06:00, 23:00–24:00 Oct 15 00:00–06:00, 23:00–24:00 Oct 16 00:00–06:00 Oct 17 01:00–02:00, 04:00–08:00 Oct 18 00:00–07:00, 23:00–24:00 Oct 19 00:00–07:00, 23:00–24:00 Oct 20 00:00–07:00 Oct 21 00:00–08:00 Oct 22 00:00–08:00 Oct 23 05:00–09:00 Oct 24 00:00–07:00 Oct 25 00:00–03:00, 05:00–06:00, 20:00–23:00 Oct 26 21:00–24:00 Oct 27 00:00–01:00, 05:00–07:00, 23:00–24:00 Oct 28 00:00–01:00, 23:00–24:00 Oct 29 00:00–06:00, 23:00–24:00 Oct 30 00:00–09:00, 23:00–24:00 Oct 31 00:00–03:00, 05:00–07:00
November
Nov 1 00:00–08:00 Nov 3 05:00–09:00, 23:00–24:00 Nov 4 00:00–08:00, 23:00–24:00 Nov 5 00:00–01:00, 03:00–08:00, 23:00–24:00 Nov 6 00:00–07:00, 23:00–24:00 Nov 7 00:00–09:00 Nov 8 00:00–04:00, 06:00–07:00 Nov 9 03:00–04:00, 22:00–24:00 Nov 10 00:00–01:00, 04:00–05:00, 23:00–24:00 Nov 11 00:00–08:00, 23:00–24:00 Nov 12 00:00–02:00, 04:00–05:00, 07:00–08:00, 23:00–24:00 Nov 13 00:00–08:00 Nov 14 00:00–09:00, 23:00–24:00 Nov 15 00:00–04:00, 06:00–08:00, 23:00–24:00 Nov 16 00:00–04:00, 06:00–08:00, 22:00–24:00 Nov 17 00:00–09:00 Nov 18 00:00–09:00 Nov 19 00:00–10:00, 23:00–24:00 Nov 20 00:00–08:00 Nov 21 00:00–06:00 Nov 22 00:00–02:00, 04:00–07:00 Nov 25 05:00–08:00 Nov 26 00:00–09:00, 23:00–24:00 Nov 27 00:00–07:00, 23:00–24:00 Nov 28 00:00–01:00, 04:00–08:00 Nov 29 02:00–08:00 Nov 30 00:00–03:00, 05:00–09:00, 21:00–23:00
December
Dec 1 00:00–05:00, 07:00–08:00, 23:00–24:00 Dec 2 00:00–04:00, 06:00–08:00, 23:00–24:00 Dec 3 00:00–07:00 Dec 4 00:00–08:00, 23:00–24:00 Dec 5 00:00–08:00 Dec 6 00:00–11:00 Dec 7 01:00–03:00, 05:00–11:00, 23:00–24:00 Dec 8 00:00–02:00, 23:00–24:00 Dec 9 00:00–05:00 Dec 10 02:00–10:00 Dec 11 00:00–11:00 Dec 12 01:00–07:00, 09:00–12:00 Dec 13 01:00–02:00, 04:00–06:00, 09:00–13:00 Dec 15 08:00–09:00, 16:00–17:00 Dec 16 02:00–05:00, 08:00–15:00 Dec 17 03:00–11:00 Dec 18 05:00–12:00 Dec 19 00:00–12:00 Dec 20 00:00–02:00, 04:00–10:00 Dec 21 00:00–09:00, 21:00–23:00 Dec 23 00:00–10:00 Dec 24 00:00–10:00, 22:00–23:00 Dec 25 00:00–02:00 Dec 26 04:00–11:00 Dec 27 00:00–02:00, 04:00–11:00 Dec 28 01:00–04:00, 10:00–12:00 Dec 29 09:00–13:00 Dec 30 00:00–02:00, 04:00–13:00 Dec 31 07:00–12:00