Most often in January, 30 days.
Highest follower count seen that year: 46,904.
January
Jan 1 20:00–24:00 Jan 2 00:00–02:00, 12:00–14:00, 23:00–24:00 Jan 3 23:00–24:00 Jan 4 00:00–03:00, 16:00–20:00 Jan 5 22:00–24:00 Jan 6 20:00–24:00 Jan 7 02:00–05:00, 23:00–24:00 Jan 8 00:00–02:00, 17:00–19:00 Jan 9 03:00–05:00 Jan 10 23:00–24:00 Jan 11 00:00–07:00 Jan 12 03:00–05:00, 20:00–23:00 Jan 13 13:00–24:00 Jan 14 00:00–01:00, 14:00–17:00, 22:00–24:00 Jan 15 00:00–01:00, 03:00–05:00, 17:00–24:00 Jan 17 16:00–19:00 Jan 18 20:00–24:00 Jan 19 06:00–07:00, 21:00–24:00 Jan 20 13:00–15:00, 19:00–24:00 Jan 21 00:00–01:00, 15:00–19:00 Jan 22 05:00–12:00, 15:00–20:00, 22:00–24:00 Jan 23 00:00–01:00 Jan 24 03:00–05:00, 19:00–21:00 Jan 25 18:00–20:00 Jan 26 07:00–09:00 Jan 27 01:00–05:00, 07:00–12:00 Jan 28 12:00–14:00, 20:00–23:00 Jan 29 08:00–11:00, 13:00–17:00 Jan 30 08:00–11:00, 16:00–17:00 Jan 31 03:00–05:00, 08:00–11:00, 15:00–19:00
February
Feb 1 07:00–09:00 Feb 2 17:00–20:00 Feb 3 07:00–10:00, 13:00–15:00 Feb 4 10:00–15:00, 21:00–23:00 Feb 5 14:00–16:00, 19:00–23:00 Feb 6 10:00–15:00 Feb 7 13:00–15:00 Feb 8 04:00–05:00 Feb 10 14:00–16:00 Feb 11 21:00–24:00 Feb 12 21:00–24:00 Feb 13 20:00–21:00 Feb 15 14:00–16:00, 19:00–22:00 Feb 16 21:00–24:00 Feb 17 00:00–03:00, 19:00–23:00 Feb 18 11:00–14:00 Feb 20 14:00–17:00, 23:00–24:00 Feb 21 00:00–01:00 Feb 23 22:00–24:00 Feb 24 00:00–05:00 Feb 26 17:00–19:00, 22:00–23:00 Feb 27 13:00–15:00, 21:00–24:00 Feb 28 00:00–01:00
March
Mar 1 21:00–24:00 Mar 2 12:00–14:00, 16:00–18:00, 20:00–24:00 Mar 3 00:00–01:00, 22:00–24:00 Mar 4 13:00–14:00, 22:00–24:00 Mar 5 00:00–01:00, 11:00–15:00, 18:00–22:00 Mar 6 12:00–16:00 Mar 8 21:00–24:00 Mar 9 00:00–01:00, 13:00–15:00, 18:00–20:00 Mar 10 16:00–19:00, 21:00–22:00 Mar 11 20:00–22:00 Mar 12 15:00–17:00, 23:00–24:00 Mar 13 03:00–04:00, 11:00–13:00 Mar 16 22:00–24:00 Mar 17 00:00–02:00, 14:00–16:00, 19:00–21:00 Mar 18 10:00–11:00, 13:00–14:00 Mar 19 20:00–24:00 Mar 20 00:00–01:00, 22:00–24:00 Mar 21 00:00–01:00, 11:00–13:00, 21:00–23:00 Mar 22 17:00–19:00 Mar 23 11:00–12:00, 23:00–24:00 Mar 24 00:00–05:00, 15:00–17:00, 23:00–24:00 Mar 25 00:00–01:00, 11:00–24:00 Mar 26 14:00–16:00 Mar 27 12:00–15:00, 21:00–24:00 Mar 28 18:00–24:00 Mar 29 00:00–01:00, 12:00–13:00, 19:00–22:00 Mar 30 14:00–24:00 Mar 31 00:00–01:00, 15:00–16:00
April
Apr 1 16:00–18:00 Apr 2 00:00–02:00, 16:00–22:00 Apr 3 12:00–13:00, 15:00–16:00 Apr 4 04:00–08:00 Apr 5 08:00–10:00, 22:00–23:00 Apr 6 21:00–22:00 Apr 7 15:00–24:00 Apr 8 00:00–02:00, 13:00–16:00 Apr 9 07:00–10:00, 21:00–24:00 Apr 10 11:00–17:00 Apr 11 15:00–24:00 Apr 12 10:00–12:00 Apr 14 14:00–22:00 Apr 15 08:00–10:00, 13:00–15:00, 19:00–24:00 Apr 16 00:00–01:00, 11:00–13:00, 23:00–24:00 Apr 17 00:00–01:00 Apr 18 06:00–08:00, 14:00–23:00 Apr 20 12:00–14:00 Apr 21 15:00–17:00, 23:00–24:00 Apr 22 00:00–02:00, 13:00–22:00 Apr 23 13:00–17:00, 21:00–24:00 Apr 24 22:00–24:00 Apr 25 00:00–01:00, 15:00–17:00, 21:00–24:00 Apr 26 01:00–02:00, 14:00–15:00, 18:00–20:00 Apr 29 08:00–11:00, 21:00–24:00 Apr 30 00:00–01:00
May
May 1 10:00–13:00, 17:00–23:00 May 2 19:00–24:00 May 3 00:00–01:00, 19:00–23:00 May 4 07:00–12:00, 15:00–16:00, 19:00–22:00 May 5 20:00–24:00 May 6 00:00–01:00, 07:00–10:00, 20:00–24:00 May 7 00:00–01:00, 21:00–24:00 May 8 00:00–01:00 May 10 16:00–17:00, 20:00–24:00 May 11 00:00–01:00, 21:00–23:00 May 12 00:00–03:00, 14:00–17:00 May 13 00:00–03:00, 15:00–17:00, 20:00–24:00 May 14 00:00–01:00, 22:00–24:00 May 15 00:00–03:00, 12:00–14:00, 20:00–21:00, 23:00–24:00 May 16 00:00–01:00 May 19 03:00–05:00, 12:00–17:00, 22:00–24:00 May 20 00:00–01:00, 17:00–24:00 May 21 00:00–05:00, 21:00–24:00 May 22 00:00–02:00, 10:00–12:00, 20:00–24:00 May 23 00:00–01:00, 10:00–12:00, 15:00–17:00 May 25 10:00–13:00, 20:00–23:00 May 26 13:00–15:00, 20:00–24:00 May 27 15:00–17:00, 20:00–22:00 May 28 19:00–24:00 May 29 17:00–24:00 May 30 00:00–01:00, 21:00–23:00 May 31 00:00–02:00, 19:00–21:00
June
Jun 1 03:00–06:00, 21:00–24:00 Jun 2 00:00–03:00, 13:00–14:00, 19:00–22:00 Jun 3 13:00–16:00, 23:00–24:00 Jun 4 00:00–01:00, 20:00–24:00 Jun 5 00:00–02:00, 16:00–22:00 Jun 7 08:00–10:00 Jun 8 19:00–21:00, 23:00–24:00 Jun 9 00:00–05:00, 14:00–17:00, 20:00–23:00 Jun 10 16:00–19:00 Jun 11 11:00–13:00, 16:00–18:00, 21:00–23:00 Jun 12 23:00–24:00 Jun 13 00:00–02:00, 11:00–13:00, 15:00–17:00, 21:00–23:00 Jun 14 00:00–01:00 Jun 15 05:00–06:00, 14:00–17:00, 19:00–24:00 Jun 16 00:00–03:00, 23:00–24:00 Jun 17 00:00–03:00, 17:00–21:00 Jun 18 15:00–16:00, 20:00–24:00 Jun 19 00:00–03:00, 22:00–24:00 Jun 20 15:00–17:00 Jun 21 22:00–24:00 Jun 22 00:00–03:00, 23:00–24:00 Jun 23 00:00–05:00, 10:00–12:00, 20:00–22:00 Jun 24 14:00–15:00, 17:00–18:00, 20:00–24:00 Jun 25 00:00–01:00, 14:00–16:00, 23:00–24:00 Jun 26 00:00–03:00 Jun 27 00:00–03:00, 12:00–14:00, 21:00–24:00 Jun 28 15:00–16:00 Jun 29 00:00–02:00, 09:00–13:00, 16:00–19:00, 21:00–24:00 Jun 30 00:00–05:00, 17:00–22:00
July
Jul 1 00:00–03:00, 14:00–16:00, 20:00–24:00 Jul 3 16:00–24:00 Jul 4 00:00–06:00, 21:00–24:00 Jul 7 02:00–05:00, 14:00–16:00, 21:00–24:00 Jul 8 00:00–01:00 Jul 9 15:00–17:00, 21:00–24:00 Jul 10 12:00–14:00 Jul 11 22:00–24:00 Jul 12 00:00–06:00, 14:00–16:00, 22:00–24:00 Jul 13 00:00–04:00, 11:00–12:00, 14:00–20:00 Jul 14 15:00–21:00 Jul 15 09:00–15:00, 22:00–24:00 Jul 16 00:00–01:00, 22:00–24:00 Jul 17 01:00–03:00, 21:00–24:00 Jul 18 10:00–13:00, 18:00–24:00 Jul 19 00:00–02:00, 12:00–14:00, 18:00–19:00 Jul 20 21:00–24:00 Jul 21 00:00–04:00, 12:00–14:00, 17:00–19:00, 21:00–23:00 Jul 22 11:00–13:00, 21:00–24:00 Jul 23 00:00–02:00, 11:00–14:00, 18:00–24:00 Jul 25 06:00–07:00, 10:00–13:00, 15:00–17:00, 20:00–23:00 Jul 26 08:00–12:00 Jul 27 20:00–24:00 Jul 28 00:00–05:00, 11:00–14:00, 22:00–24:00 Jul 29 00:00–01:00, 07:00–10:00, 14:00–16:00, 21:00–24:00 Jul 30 12:00–13:00 Jul 31 07:00–08:00, 13:00–15:00, 19:00–22:00
August
Aug 1 19:00–24:00 Aug 2 00:00–02:00, 07:00–09:00, 14:00–16:00, 20:00–22:00 Aug 3 12:00–17:00, 19:00–24:00 Aug 4 00:00–03:00, 23:00–24:00 Aug 5 00:00–01:00, 11:00–13:00 Aug 6 01:00–04:00, 20:00–22:00 Aug 7 10:00–12:00, 15:00–17:00, 21:00–24:00 Aug 8 19:00–24:00 Aug 9 00:00–01:00, 22:00–24:00 Aug 10 00:00–01:00, 10:00–12:00, 23:00–24:00 Aug 11 00:00–02:00 Aug 12 13:00–16:00, 21:00–24:00 Aug 13 00:00–01:00, 22:00–24:00 Aug 14 00:00–02:00, 11:00–13:00, 17:00–24:00 Aug 15 11:00–12:00, 15:00–24:00 Aug 16 22:00–24:00 Aug 17 00:00–02:00, 20:00–24:00 Aug 18 00:00–03:00, 12:00–15:00, 21:00–23:00 Aug 19 08:00–10:00, 16:00–19:00 Aug 20 13:00–14:00, 22:00–24:00 Aug 21 00:00–01:00, 03:00–05:00 Aug 22 20:00–23:00 Aug 23 17:00–19:00 Aug 24 16:00–22:00 Aug 25 01:00–05:00, 23:00–24:00 Aug 26 00:00–04:00, 13:00–15:00, 20:00–22:00 Aug 27 12:00–14:00, 17:00–19:00 Aug 28 04:00–07:00, 22:00–24:00 Aug 29 00:00–03:00 Aug 31 18:00–20:00, 22:00–24:00
September
Sep 1 00:00–01:00, 03:00–06:00, 22:00–24:00 Sep 2 00:00–05:00, 23:00–24:00 Sep 3 00:00–04:00, 07:00–09:00, 20:00–22:00 Sep 4 08:00–10:00, 16:00–20:00, 22:00–24:00 Sep 5 00:00–01:00, 15:00–17:00 Sep 6 22:00–24:00 Sep 7 00:00–04:00, 15:00–16:00, 20:00–23:00 Sep 8 00:00–04:00, 17:00–24:00 Sep 9 00:00–01:00, 06:00–08:00, 22:00–24:00 Sep 10 00:00–03:00, 23:00–24:00 Sep 11 00:00–01:00, 09:00–10:00, 20:00–22:00 Sep 12 17:00–19:00 Sep 13 14:00–16:00, 21:00–24:00 Sep 15 00:00–05:00, 15:00–17:00, 20:00–22:00 Sep 16 14:00–16:00, 18:00–19:00 Sep 17 10:00–12:00, 23:00–24:00 Sep 18 00:00–02:00, 14:00–15:00 Sep 19 21:00–24:00 Sep 20 00:00–02:00, 09:00–11:00, 21:00–24:00 Sep 21 20:00–24:00 Sep 23 01:00–03:00, 16:00–18:00 Sep 24 23:00–24:00 Sep 25 00:00–02:00, 16:00–18:00 Sep 26 08:00–11:00, 15:00–16:00, 19:00–23:00 Sep 27 18:00–21:00 Sep 28 17:00–19:00 Sep 29 03:00–05:00, 12:00–14:00, 21:00–23:00 Sep 30 12:00–16:00, 19:00–22:00
October
Oct 1 19:00–20:00 Oct 2 11:00–14:00, 16:00–19:00, 21:00–24:00 Oct 3 00:00–01:00, 23:00–24:00 Oct 4 00:00–03:00, 11:00–13:00 Oct 5 22:00–24:00 Oct 6 00:00–01:00, 22:00–24:00 Oct 7 19:00–22:00 Oct 8 13:00–14:00, 21:00–24:00 Oct 9 00:00–03:00, 16:00–17:00, 20:00–24:00 Oct 11 05:00–08:00 Oct 12 22:00–24:00 Oct 13 00:00–02:00, 18:00–24:00 Oct 14 12:00–16:00, 22:00–24:00 Oct 15 00:00–01:00, 18:00–21:00 Oct 16 12:00–14:00, 21:00–24:00 Oct 17 00:00–02:00, 12:00–14:00, 19:00–21:00 Oct 18 15:00–19:00, 21:00–24:00 Oct 19 00:00–01:00, 21:00–23:00 Oct 20 11:00–13:00, 21:00–24:00 Oct 21 00:00–03:00, 09:00–11:00, 19:00–23:00 Oct 22 13:00–15:00, 17:00–24:00 Oct 23 00:00–01:00, 07:00–09:00, 13:00–15:00, 21:00–24:00 Oct 24 16:00–18:00 Oct 25 01:00–03:00, 20:00–23:00 Oct 26 15:00–17:00, 21:00–24:00 Oct 27 04:00–06:00, 14:00–16:00 Oct 28 00:00–03:00, 22:00–24:00 Oct 29 00:00–02:00, 20:00–23:00 Oct 30 06:00–09:00, 15:00–17:00 Oct 31 01:00–03:00, 13:00–15:00, 19:00–21:00, 23:00–24:00
November
Nov 1 00:00–03:00 Nov 2 00:00–01:00, 23:00–24:00 Nov 3 00:00–03:00, 22:00–24:00 Nov 4 00:00–03:00 Nov 5 22:00–24:00 Nov 6 00:00–03:00 Nov 7 03:00–05:00 Nov 8 08:00–09:00, 22:00–24:00 Nov 9 00:00–01:00, 15:00–17:00, 22:00–24:00 Nov 10 00:00–03:00, 15:00–17:00, 21:00–23:00 Nov 11 07:00–09:00, 15:00–16:00, 22:00–23:00 Nov 12 22:00–24:00 Nov 13 00:00–01:00, 21:00–24:00 Nov 14 00:00–03:00 Nov 16 22:00–24:00 Nov 17 00:00–05:00, 22:00–24:00 Nov 18 00:00–02:00, 15:00–17:00, 20:00–22:00 Nov 19 15:00–17:00 Nov 20 20:00–24:00 Nov 21 00:00–02:00, 22:00–24:00 Nov 22 00:00–01:00, 20:00–22:00 Nov 25 23:00–24:00 Nov 26 00:00–01:00, 19:00–22:00 Nov 27 14:00–24:00 Nov 28 00:00–01:00, 15:00–19:00 Nov 30 21:00–23:00
December
Dec 2 19:00–22:00 Dec 3 23:00–24:00 Dec 4 15:00–21:00 Dec 5 17:00–20:00 Dec 6 18:00–22:00 Dec 7 10:00–12:00, 21:00–24:00 Dec 8 14:00–23:00 Dec 9 11:00–12:00, 18:00–23:00 Dec 10 11:00–14:00, 21:00–23:00 Dec 11 11:00–13:00, 20:00–24:00 Dec 12 11:00–12:00, 14:00–16:00, 18:00–23:00 Dec 13 11:00–13:00, 17:00–23:00 Dec 14 10:00–13:00, 21:00–24:00 Dec 15 00:00–02:00, 12:00–14:00, 18:00–23:00 Dec 18 18:00–23:00 Dec 19 22:00–24:00 Dec 20 00:00–02:00, 13:00–21:00 Dec 21 14:00–24:00 Dec 22 00:00–01:00 Dec 23 19:00–24:00 Dec 24 00:00–03:00 Dec 25 12:00–24:00 Dec 26 00:00–01:00, 15:00–16:00, 23:00–24:00 Dec 27 00:00–02:00 Dec 28 01:00–03:00, 20:00–24:00 Dec 29 00:00–02:00, 13:00–19:00 Dec 30 00:00–03:00, 19:00–21:00 Dec 31 18:00–24:00