Most often in January, 29 days.
Highest follower count seen that year: 324,578.
January
Jan 2 12:00–16:00, 18:00–20:00 Jan 3 13:00–16:00, 18:00–21:00 Jan 4 10:00–11:00, 14:00–21:00 Jan 5 09:00–15:00, 18:00–20:00 Jan 6 07:00–08:00 Jan 7 13:00–17:00 Jan 8 13:00–17:00, 19:00–21:00 Jan 9 08:00–10:00, 13:00–16:00, 19:00–20:00 Jan 10 09:00–11:00, 17:00–20:00 Jan 11 07:00–09:00, 19:00–21:00 Jan 12 07:00–10:00, 12:00–16:00, 18:00–20:00 Jan 13 14:00–17:00, 19:00–21:00 Jan 14 13:00–14:00, 16:00–20:00 Jan 15 12:00–16:00 Jan 16 08:00–11:00, 13:00–15:00 Jan 17 14:00–18:00 Jan 18 07:00–10:00, 12:00–17:00, 19:00–20:00 Jan 19 09:00–11:00, 13:00–21:00 Jan 21 08:00–09:00, 11:00–16:00, 18:00–20:00 Jan 22 18:00–21:00 Jan 23 09:00–10:00, 13:00–15:00, 17:00–18:00 Jan 24 14:00–16:00, 19:00–21:00 Jan 25 15:00–17:00 Jan 26 08:00–11:00, 13:00–17:00 Jan 27 08:00–10:00 Jan 28 07:00–11:00, 13:00–18:00 Jan 29 07:00–11:00, 13:00–17:00 Jan 30 15:00–17:00 Jan 31 07:00–10:00, 18:00–20:00
February
Feb 1 07:00–11:00, 14:00–18:00 Feb 2 08:00–12:00, 16:00–18:00 Feb 3 13:00–16:00 Feb 4 07:00–10:00, 12:00–18:00 Feb 5 07:00–10:00, 13:00–17:00 Feb 6 08:00–16:00 Feb 7 16:00–20:00 Feb 8 07:00–10:00, 13:00–16:00 Feb 9 07:00–09:00, 14:00–16:00 Feb 10 08:00–09:00, 13:00–16:00 Feb 12 08:00–10:00 Feb 13 08:00–09:00, 15:00–18:00 Feb 14 07:00–10:00, 12:00–17:00 Feb 15 08:00–10:00, 12:00–16:00 Feb 16 09:00–19:00 Feb 17 08:00–10:00, 12:00–16:00 Feb 18 07:00–11:00, 13:00–17:00 Feb 19 08:00–11:00 Feb 20 08:00–09:00 Feb 21 08:00–11:00, 13:00–18:00 Feb 22 09:00–11:00, 13:00–17:00 Feb 23 07:00–11:00, 14:00–15:00 Feb 24 08:00–11:00, 14:00–17:00 Feb 25 08:00–10:00 Feb 26 08:00–11:00, 13:00–17:00 Feb 28 08:00–09:00
March
Mar 1 10:00–16:00 Mar 2 07:00–11:00, 13:00–17:00 Mar 3 13:00–17:00 Mar 4 08:00–11:00, 14:00–17:00 Mar 5 08:00–11:00, 14:00–17:00 Mar 6 08:00–10:00, 13:00–16:00 Mar 7 08:00–11:00, 13:00–15:00 Mar 8 08:00–11:00, 14:00–16:00 Mar 9 08:00–10:00, 13:00–16:00 Mar 10 09:00–11:00, 15:00–17:00 Mar 11 06:00–10:00, 14:00–16:00 Mar 12 09:00–10:00 Mar 13 13:00–17:00 Mar 14 07:00–11:00, 13:00–18:00 Mar 15 07:00–11:00, 14:00–17:00 Mar 16 07:00–11:00 Mar 17 08:00–10:00 Mar 18 10:00–13:00 Mar 19 08:00–10:00 Mar 21 12:00–16:00 Mar 22 08:00–11:00, 13:00–16:00 Mar 23 07:00–10:00, 12:00–16:00 Mar 24 08:00–12:00 Mar 25 08:00–10:00 Mar 26 05:00–07:00, 14:00–18:00 Mar 27 06:00–10:00, 14:00–19:00 Mar 28 06:00–10:00, 14:00–18:00 Mar 29 08:00–11:00, 15:00–18:00 Mar 30 06:00–09:00, 13:00–15:00
April
Apr 1 05:00–10:00, 12:00–17:00 Apr 2 06:00–09:00, 15:00–18:00 Apr 3 06:00–07:00 Apr 4 05:00–10:00, 14:00–18:00 Apr 5 10:00–15:00 Apr 6 10:00–15:00 Apr 7 11:00–12:00 Apr 9 09:00–10:00, 15:00–17:00 Apr 11 10:00–15:00 Apr 12 10:00–13:00, 16:00–17:00 Apr 13 07:00–10:00, 13:00–15:00 Apr 16 08:00–11:00, 13:00–15:00 Apr 17 08:00–12:00 Apr 18 10:00–14:00 Apr 19 06:00–10:00, 14:00–16:00 Apr 20 08:00–10:00 Apr 21 06:00–10:00, 12:00–15:00 Apr 25 07:00–10:00, 12:00–16:00 Apr 26 06:00–10:00, 12:00–16:00 Apr 27 07:00–10:00 Apr 29 05:00–06:00 Apr 30 12:00–14:00
May
May 1 06:00–08:00, 11:00–14:00, 16:00–18:00 May 2 09:00–10:00 May 3 07:00–10:00, 12:00–17:00 May 4 06:00–09:00, 14:00–16:00 May 6 08:00–09:00, 13:00–14:00 May 8 06:00–10:00, 14:00–15:00 May 9 08:00–11:00 May 10 06:00–10:00, 13:00–15:00 May 11 06:00–10:00, 12:00–15:00 May 12 07:00–09:00, 11:00–12:00 May 14 15:00–18:00 May 15 08:00–10:00, 12:00–14:00 May 17 08:00–10:00, 13:00–19:00 May 18 08:00–11:00, 13:00–16:00 May 19 07:00–10:00, 13:00–15:00 May 20 07:00–10:00 May 21 09:00–11:00, 14:00–17:00 May 23 05:00–08:00, 16:00–18:00 May 24 05:00–09:00, 14:00–18:00 May 27 16:00–18:00 May 28 06:00–07:00 May 29 07:00–09:00, 13:00–15:00
June
Jun 1 14:00–17:00 Jun 2 07:00–10:00, 13:00–16:00 Jun 3 06:00–09:00 Jun 4 15:00–17:00 Jun 5 07:00–13:00 Jun 6 06:00–09:00, 12:00–18:00 Jun 7 10:00–12:00, 15:00–17:00 Jun 8 07:00–18:00 Jun 11 08:00–10:00, 14:00–16:00 Jun 13 08:00–10:00, 14:00–16:00 Jun 28 06:00–10:00, 12:00–16:00 Jun 29 07:00–10:00, 13:00–18:00 Jun 30 06:00–09:00
July
Jul 2 07:00–10:00, 13:00–18:00 Jul 3 06:00–10:00 Jul 4 14:00–18:00 Jul 5 10:00–13:00, 16:00–18:00 Jul 7 13:00–18:00 Jul 9 08:00–10:00, 12:00–16:00 Jul 10 14:00–17:00 Jul 11 07:00–09:00, 16:00–18:00 Jul 12 07:00–10:00, 14:00–17:00 Jul 13 07:00–10:00, 13:00–17:00 Jul 14 14:00–16:00 Jul 15 11:00–16:00 Jul 16 08:00–10:00 Jul 17 05:00–07:00 Jul 18 11:00–15:00 Jul 19 05:00–07:00, 11:00–14:00 Jul 20 10:00–14:00, 16:00–17:00 Jul 21 14:00–18:00 Jul 22 14:00–17:00 Jul 23 10:00–14:00, 16:00–18:00 Jul 24 10:00–13:00, 16:00–18:00 Jul 25 13:00–17:00 Jul 26 11:00–13:00, 16:00–18:00 Jul 29 10:00–12:00 Jul 30 10:00–12:00
August
Aug 1 09:00–10:00, 18:00–19:00 Aug 2 10:00–12:00, 14:00–17:00 Aug 3 10:00–14:00, 16:00–18:00 Aug 4 11:00–14:00, 17:00–19:00 Aug 6 10:00–12:00, 16:00–19:00 Aug 9 10:00–16:00 Aug 10 10:00–14:00, 16:00–18:00 Aug 11 13:00–15:00 Aug 12 13:00–16:00 Aug 13 10:00–12:00, 15:00–18:00 Aug 14 10:00–12:00, 14:00–16:00 Aug 15 07:00–12:00 Aug 16 10:00–14:00 Aug 17 10:00–14:00 Aug 19 10:00–15:00 Aug 20 09:00–12:00 Aug 22 09:00–14:00 Aug 23 10:00–15:00 Aug 24 09:00–14:00 Aug 25 10:00–15:00 Aug 26 09:00–14:00 Aug 27 11:00–14:00 Aug 29 09:00–15:00 Aug 30 09:00–14:00 Aug 31 10:00–15:00
September
Sep 3 09:00–15:00 Sep 4 14:00–18:00 Sep 5 09:00–15:00 Sep 6 11:00–15:00 Sep 7 10:00–15:00 Sep 9 09:00–15:00 Sep 10 10:00–15:00 Sep 11 13:00–15:00 Sep 14 15:00–19:00 Sep 15 08:00–13:00 Sep 17 10:00–13:00 Sep 18 09:00–15:00 Sep 19 12:00–16:00 Sep 20 10:00–15:00 Sep 21 09:00–14:00 Sep 22 14:00–17:00 Sep 24 10:00–13:00 Sep 25 16:00–18:00 Sep 27 09:00–12:00 Sep 28 10:00–11:00, 13:00–17:00 Sep 29 10:00–15:00 Sep 30 17:00–19:00
October
Oct 1 10:00–15:00 Oct 3 10:00–15:00 Oct 4 07:00–12:00 Oct 5 10:00–14:00 Oct 6 07:00–13:00 Oct 7 05:00–08:00 Oct 11 09:00–15:00 Oct 12 09:00–14:00 Oct 13 05:00–08:00, 15:00–17:00 Oct 15 14:00–17:00 Oct 17 05:00–07:00, 09:00–13:00, 17:00–18:00 Oct 18 05:00–09:00, 11:00–14:00 Oct 19 09:00–11:00, 14:00–16:00 Oct 20 10:00–14:00, 18:00–20:00 Oct 21 09:00–14:00 Oct 22 09:00–15:00 Oct 23 07:00–13:00 Oct 24 11:00–15:00 Oct 25 04:00–07:00, 18:00–21:00 Oct 26 08:00–12:00, 16:00–18:00 Oct 27 16:00–19:00 Oct 28 10:00–15:00, 19:00–20:00 Oct 29 05:00–09:00 Oct 30 12:00–15:00 Oct 31 14:00–20:00
November
Nov 1 08:00–15:00 Nov 2 07:00–11:00, 15:00–17:00 Nov 3 05:00–07:00 Nov 5 10:00–17:00 Nov 6 09:00–10:00, 13:00–16:00 Nov 7 05:00–07:00, 09:00–13:00, 19:00–20:00 Nov 8 05:00–06:00, 15:00–17:00 Nov 9 07:00–09:00, 15:00–18:00 Nov 10 15:00–19:00 Nov 11 09:00–11:00, 15:00–19:00 Nov 12 16:00–19:00 Nov 13 10:00–12:00, 15:00–17:00 Nov 14 05:00–08:00, 14:00–17:00 Nov 17 10:00–15:00 Nov 18 09:00–10:00 Nov 19 06:00–09:00, 15:00–19:00 Nov 20 10:00–19:00 Nov 21 06:00–08:00 Nov 22 05:00–09:00, 11:00–18:00 Nov 23 06:00–10:00, 16:00–19:00 Nov 24 07:00–10:00, 12:00–16:00 Nov 25 09:00–12:00 Nov 26 06:00–08:00, 15:00–19:00 Nov 27 08:00–10:00, 16:00–20:00 Nov 28 17:00–20:00 Nov 30 17:00–19:00
December
Dec 1 13:00–15:00 Dec 2 12:00–15:00, 17:00–19:00 Dec 3 15:00–19:00 Dec 4 10:00–13:00 Dec 5 10:00–13:00, 18:00–20:00 Dec 6 06:00–10:00, 16:00–19:00 Dec 7 11:00–15:00, 19:00–20:00 Dec 10 16:00–20:00 Dec 11 07:00–09:00 Dec 12 09:00–13:00, 18:00–20:00 Dec 13 06:00–10:00, 18:00–21:00 Dec 14 14:00–17:00 Dec 17 15:00–19:00 Dec 18 11:00–15:00 Dec 19 13:00–16:00 Dec 20 07:00–10:00 Dec 21 11:00–15:00 Dec 22 08:00–09:00 Dec 25 14:00–18:00 Dec 26 09:00–13:00 Dec 27 06:00–10:00 Dec 28 11:00–15:00 Dec 29 06:00–09:00 Dec 30 17:00–20:00 Dec 31 16:00–18:00