Most often in June, 29 days.
Highest follower count seen that year: 6,181.
May
May 23 20:00–24:00 May 24 00:00–03:00, 20:00–24:00 May 25 00:00–04:00, 20:00–24:00 May 26 00:00–03:00, 21:00–24:00 May 27 00:00–03:00, 21:00–24:00 May 28 00:00–03:00 May 29 22:00–24:00 May 30 00:00–03:00, 22:00–23:00 May 31 00:00–03:00, 22:00–24:00
June
Jun 1 00:00–03:00, 22:00–24:00 Jun 2 00:00–04:00, 21:00–24:00 Jun 3 00:00–03:00, 21:00–24:00 Jun 4 00:00–03:00 Jun 5 21:00–24:00 Jun 6 00:00–04:00, 22:00–24:00 Jun 7 00:00–03:00, 21:00–24:00 Jun 8 00:00–03:00, 21:00–24:00 Jun 9 00:00–04:00, 22:00–24:00 Jun 10 00:00–03:00, 17:00–18:00, 21:00–24:00 Jun 11 00:00–03:00 Jun 13 22:00–23:00 Jun 14 00:00–03:00, 21:00–24:00 Jun 15 00:00–03:00, 22:00–24:00 Jun 16 00:00–04:00, 22:00–24:00 Jun 17 00:00–03:00, 21:00–24:00 Jun 18 00:00–03:00 Jun 19 21:00–24:00 Jun 20 00:00–11:00 Jun 21 15:00–24:00 Jun 22 00:00–01:00, 03:00–11:00, 22:00–24:00 Jun 23 00:00–03:00, 06:00–10:00, 22:00–24:00 Jun 24 00:00–03:00, 21:00–24:00 Jun 25 00:00–02:00 Jun 26 21:00–24:00 Jun 27 00:00–03:00, 07:00–12:00, 21:00–24:00 Jun 28 00:00–03:00, 06:00–07:00, 10:00–12:00, 23:00–24:00 Jun 29 00:00–10:00 Jun 30 00:00–04:00, 21:00–24:00
July
Jul 1 00:00–03:00, 21:00–24:00 Jul 2 00:00–03:00 Jul 3 21:00–24:00 Jul 4 00:00–03:00, 21:00–24:00 Jul 5 00:00–12:00 Jul 6 01:00–06:00, 16:00–20:00 Jul 7 21:00–24:00 Jul 8 00:00–05:00, 21:00–24:00 Jul 9 00:00–03:00 Jul 10 22:00–24:00 Jul 11 00:00–04:00, 21:00–24:00 Jul 12 00:00–04:00, 14:00–19:00, 21:00–24:00 Jul 13 00:00–09:00, 22:00–24:00 Jul 14 00:00–04:00, 13:00–19:00, 22:00–24:00 Jul 15 00:00–04:00, 21:00–24:00 Jul 16 00:00–01:00 Jul 17 22:00–24:00 Jul 18 00:00–04:00, 13:00–19:00, 21:00–24:00 Jul 19 00:00–03:00, 14:00–19:00, 21:00–24:00 Jul 20 00:00–03:00, 14:00–19:00, 21:00–24:00 Jul 21 00:00–03:00, 15:00–19:00, 21:00–24:00 Jul 22 00:00–03:00, 05:00–08:00, 14:00–19:00, 21:00–24:00 Jul 24 22:00–24:00 Jul 25 00:00–04:00, 14:00–24:00 Jul 26 00:00–02:00, 12:00–19:00, 21:00–24:00 Jul 27 01:00–10:00, 13:00–17:00 Jul 28 12:00–19:00 Jul 29 13:00–24:00
August
Aug 1 13:00–19:00, 21:00–24:00 Aug 2 00:00–02:00, 12:00–24:00 Aug 3 00:00–02:00, 15:00–18:00, 21:00–24:00 Aug 4 00:00–01:00, 14:00–21:00 Aug 5 13:00–19:00 Aug 7 15:00–20:00 Aug 9 13:00–17:00 Aug 10 13:00–21:00, 23:00–24:00 Aug 11 00:00–03:00, 06:00–11:00, 13:00–16:00 Aug 12 13:00–19:00, 21:00–24:00 Aug 14 22:00–24:00 Aug 15 00:00–05:00, 21:00–24:00 Aug 16 00:00–09:00, 21:00–24:00 Aug 17 00:00–05:00, 20:00–24:00 Aug 18 00:00–03:00, 06:00–12:00, 22:00–24:00 Aug 19 00:00–04:00, 21:00–24:00 Aug 20 00:00–07:00 Aug 21 23:00–24:00 Aug 22 00:00–09:00, 20:00–24:00 Aug 23 00:00–03:00, 05:00–10:00, 21:00–24:00 Aug 24 00:00–04:00, 06:00–10:00, 22:00–24:00 Aug 25 00:00–03:00, 21:00–24:00 Aug 26 00:00–03:00, 14:00–21:00 Aug 29 06:00–10:00, 20:00–24:00 Aug 30 00:00–03:00, 21:00–24:00 Aug 31 00:00–09:00, 21:00–24:00
September
Sep 1 00:00–12:00, 21:00–24:00 Sep 2 00:00–11:00 Sep 3 02:00–08:00 Sep 4 22:00–24:00 Sep 5 00:00–04:00, 21:00–24:00 Sep 6 00:00–06:00, 21:00–24:00 Sep 7 00:00–11:00 Sep 8 22:00–24:00 Sep 9 00:00–03:00, 21:00–24:00 Sep 10 00:00–07:00 Sep 12 00:00–11:00, 21:00–24:00 Sep 13 00:00–02:00, 04:00–11:00, 23:00–24:00 Sep 14 00:00–12:00 Sep 15 01:00–14:00, 23:00–24:00 Sep 16 00:00–12:00, 23:00–24:00 Sep 17 00:00–10:00 Sep 19 14:00–24:00 Sep 20 00:00–09:00 Sep 21 23:00–24:00 Sep 22 00:00–11:00 Sep 23 00:00–10:00, 22:00–24:00 Sep 24 00:00–01:00, 05:00–07:00 Sep 26 05:00–13:00, 15:00–18:00 Sep 27 05:00–12:00 Sep 28 07:00–13:00, 15:00–17:00, 22:00–24:00 Sep 29 00:00–08:00 Sep 30 00:00–09:00, 22:00–24:00
October
Oct 1 00:00–03:00 Oct 2 23:00–24:00 Oct 3 05:00–10:00, 23:00–24:00 Oct 4 00:00–03:00 Oct 5 16:00–24:00 Oct 6 00:00–04:00, 15:00–18:00, 20:00–24:00 Oct 7 00:00–04:00, 07:00–09:00, 15:00–19:00, 23:00–24:00 Oct 8 00:00–03:00 Oct 9 23:00–24:00 Oct 10 00:00–05:00, 07:00–12:00, 15:00–16:00 Oct 14 23:00–24:00 Oct 15 00:00–09:00 Oct 17 06:00–12:00 Oct 18 05:00–14:00, 16:00–17:00 Oct 19 06:00–11:00, 15:00–18:00 Oct 21 06:00–12:00, 14:00–18:00 Oct 22 06:00–10:00 Oct 24 07:00–13:00, 15:00–19:00 Oct 25 07:00–16:00 Oct 26 00:00–10:00, 21:00–24:00 Oct 27 00:00–09:00 Oct 28 06:00–12:00, 23:00–24:00 Oct 29 00:00–10:00 Oct 31 07:00–16:00
November
Nov 1 07:00–13:00, 21:00–24:00 Nov 2 00:00–03:00, 07:00–09:00, 21:00–24:00 Nov 3 00:00–03:00, 22:00–24:00 Nov 4 00:00–10:00, 22:00–24:00 Nov 5 00:00–07:00 Nov 6 23:00–24:00 Nov 7 00:00–06:00, 21:00–24:00 Nov 8 00:00–04:00, 21:00–24:00 Nov 9 00:00–04:00, 07:00–12:00, 21:00–24:00 Nov 10 00:00–04:00, 21:00–24:00 Nov 11 00:00–09:00, 23:00–24:00 Nov 12 00:00–10:00 Nov 14 05:00–13:00 Nov 15 00:00–04:00, 21:00–23:00 Nov 16 00:00–10:00, 16:00–23:00 Nov 17 21:00–24:00 Nov 18 00:00–04:00, 06:00–15:00, 22:00–24:00 Nov 19 00:00–05:00 Nov 21 00:00–13:00 Nov 22 02:00–13:00, 23:00–24:00 Nov 23 00:00–04:00, 22:00–24:00 Nov 24 00:00–13:00, 15:00–17:00, 23:00–24:00 Nov 25 00:00–03:00, 06:00–14:00 Nov 26 00:00–04:00, 06:00–10:00 Nov 27 23:00–24:00 Nov 28 00:00–04:00, 06:00–13:00 Nov 29 00:00–08:00, 22:00–24:00 Nov 30 00:00–03:00, 05:00–12:00
December
Dec 1 05:00–13:00, 23:00–24:00 Dec 2 00:00–04:00, 06:00–11:00 Dec 3 00:00–11:00 Dec 5 01:00–12:00, 21:00–24:00 Dec 6 00:00–12:00 Dec 7 06:00–14:00, 22:00–24:00 Dec 8 07:00–12:00, 22:00–24:00 Dec 9 00:00–04:00, 06:00–10:00, 23:00–24:00 Dec 10 00:00–03:00, 06:00–11:00 Dec 12 07:00–12:00, 16:00–18:00 Dec 13 01:00–12:00 Dec 14 02:00–13:00 Dec 15 22:00–24:00 Dec 16 00:00–03:00, 05:00–07:00, 10:00–12:00 Dec 19 06:00–12:00 Dec 20 05:00–12:00 Dec 22 00:00–04:00, 06:00–12:00