Most often in March, 25 days.
Highest follower count seen that year: 4,363.
January
Jan 1 05:00–16:00 Jan 2 05:00–14:00 Jan 3 04:00–07:00 Jan 4 05:00–12:00 Jan 5 04:00–08:00 Jan 6 04:00–13:00 Jan 7 04:00–07:00, 09:00–11:00 Jan 8 05:00–08:00 Jan 11 05:00–08:00 Jan 12 05:00–09:00 Jan 13 05:00–06:00 Jan 14 04:00–08:00, 11:00–12:00 Jan 15 04:00–08:00 Jan 16 04:00–10:00 Jan 17 04:00–07:00 Jan 18 03:00–10:00, 12:00–15:00 Jan 19 04:00–07:00 Jan 20 04:00–08:00 Jan 24 05:00–10:00 Jan 25 06:00–09:00, 12:00–13:00 Jan 29 04:00–10:00 Jan 30 05:00–11:00 Jan 31 04:00–09:00
February
Feb 1 05:00–10:00 Feb 2 05:00–09:00, 12:00–16:00 Feb 3 04:00–10:00 Feb 6 05:00–10:00 Feb 7 04:00–11:00 Feb 8 04:00–13:00 Feb 9 05:00–08:00, 10:00–13:00 Feb 10 03:00–09:00 Feb 11 04:00–07:00 Feb 14 03:00–09:00 Feb 15 04:00–07:00, 10:00–12:00 Feb 16 04:00–09:00 Feb 18 04:00–09:00, 13:00–15:00 Feb 22 05:00–08:00 Feb 23 04:00–06:00 Feb 24 04:00–08:00, 12:00–14:00 Feb 25 03:00–07:00
March
Mar 2 05:00–10:00 Mar 3 04:00–08:00 Mar 4 04:00–07:00, 09:00–12:00 Mar 6 04:00–07:00, 09:00–13:00 Mar 7 04:00–08:00, 10:00–12:00 Mar 8 04:00–08:00, 11:00–13:00 Mar 9 04:00–09:00 Mar 10 04:00–08:00, 10:00–13:00 Mar 11 04:00–07:00, 10:00–12:00 Mar 13 04:00–08:00 Mar 14 05:00–08:00 Mar 15 04:00–08:00, 11:00–14:00 Mar 16 04:00–08:00 Mar 17 04:00–10:00 Mar 20 12:00–13:00 Mar 21 05:00–06:00, 11:00–13:00 Mar 22 06:00–08:00, 11:00–13:00 Mar 23 04:00–08:00 Mar 24 03:00–08:00, 10:00–13:00 Mar 25 02:00–07:00, 09:00–11:00 Mar 27 02:00–08:00 Mar 28 03:00–06:00, 08:00–10:00 Mar 29 03:00–09:00, 12:00–15:00 Mar 30 03:00–08:00 Mar 31 03:00–05:00
April
Apr 1 03:00–09:00 Apr 3 04:00–08:00 Apr 4 03:00–07:00, 13:00–15:00 Apr 5 04:00–07:00 Apr 6 05:00–06:00 Apr 8 03:00–08:00 Apr 9 03:00–07:00 Apr 10 03:00–07:00 Apr 12 03:00–08:00, 12:00–15:00 Apr 13 04:00–07:00 Apr 15 04:00–08:00 Apr 16 03:00–07:00 Apr 17 03:00–07:00 Apr 18 03:00–08:00 Apr 19 05:00–06:00 Apr 21 04:00–07:00 Apr 22 04:00–09:00 Apr 23 03:00–06:00 Apr 25 03:00–07:00 Apr 27 05:00–08:00, 12:00–14:00 Apr 28 10:00–11:00 Apr 29 05:00–08:00 Apr 30 06:00–07:00
May
May 2 05:00–06:00 May 3 04:00–08:00 May 4 04:00–07:00 May 5 04:00–11:00 May 6 03:00–11:00 May 8 04:00–09:00 May 9 04:00–10:00 May 10 05:00–10:00 May 11 04:00–08:00 May 17 04:00–07:00 May 18 05:00–10:00 May 19 04:00–07:00 May 22 15:00–16:00 May 23 06:00–08:00, 11:00–14:00 May 26 06:00–08:00 May 27 04:00–05:00 May 28 05:00–07:00 May 29 04:00–07:00 May 31 04:00–10:00, 12:00–15:00
June
Jun 1 04:00–10:00 Jun 2 02:00–08:00 Jun 3 04:00–08:00 Jun 7 05:00–09:00, 12:00–14:00 Jun 8 05:00–13:00 Jun 9 04:00–07:00 Jun 10 04:00–08:00 Jun 12 01:00–05:00 Jun 14 06:00–07:00, 13:00–17:00 Jun 15 04:00–08:00, 13:00–16:00 Jun 20 05:00–09:00, 14:00–16:00 Jun 21 03:00–14:00 Jun 22 04:00–08:00, 11:00–13:00 Jun 23 04:00–07:00
July
Jul 4 05:00–09:00, 14:00–15:00 Jul 5 05:00–09:00, 12:00–13:00 Jul 6 06:00–07:00, 13:00–16:00 Jul 8 06:00–07:00 Jul 9 04:00–07:00 Jul 10 04:00–06:00 Jul 11 05:00–11:00 Jul 12 05:00–10:00, 12:00–14:00 Jul 13 05:00–08:00 Jul 14 05:00–07:00
August
Aug 2 05:00–09:00 Aug 3 04:00–08:00 Aug 4 04:00–08:00, 12:00–15:00 Aug 5 06:00–08:00 Aug 7 06:00–09:00, 14:00–18:00 Aug 8 05:00–06:00 Aug 9 05:00–09:00, 14:00–16:00 Aug 31 05:00–07:00
September
Sep 3 04:00–06:00 Sep 4 06:00–09:00 Sep 7 07:00–10:00 Sep 15 06:00–10:00, 15:00–20:00 Sep 16 06:00–08:00 Sep 18 02:00–05:00 Sep 20 02:00–08:00 Sep 21 01:00–08:00 Sep 22 05:00–08:00 Sep 23 06:00–09:00, 13:00–15:00 Sep 25 06:00–08:00, 10:00–14:00 Sep 26 03:00–14:00 Sep 28 03:00–08:00, 11:00–15:00 Sep 29 02:00–06:00
October
Oct 10 12:00–13:00 Oct 11 03:00–11:00 Oct 12 05:00–09:00, 12:00–15:00 Oct 15 04:00–07:00 Oct 16 03:00–07:00, 12:00–14:00 Oct 17 04:00–07:00 Oct 18 03:00–07:00, 12:00–14:00 Oct 19 02:00–06:00 Oct 23 04:00–07:00, 12:00–15:00 Oct 24 04:00–07:00 Oct 25 04:00–06:00 Oct 26 04:00–10:00 Oct 27 03:00–07:00 Oct 29 06:00–12:00 Oct 30 05:00–08:00
November
Nov 3 04:00–08:00, 11:00–13:00 Nov 4 03:00–08:00, 13:00–15:00 Nov 5 02:00–07:00 Nov 8 07:00–13:00 Nov 9 04:00–05:00, 07:00–15:00 Nov 10 03:00–07:00 Nov 11 05:00–08:00 Nov 12 04:00–06:00 Nov 15 06:00–14:00 Nov 16 03:00–13:00 Nov 17 04:00–08:00 Nov 19 03:00–07:00 Nov 20 05:00–09:00 Nov 21 05:00–08:00 Nov 22 04:00–09:00 Nov 23 04:00–07:00, 11:00–16:00 Nov 25 06:00–09:00 Nov 26 04:00–08:00, 12:00–15:00 Nov 28 06:00–08:00, 11:00–14:00 Nov 29 06:00–09:00, 13:00–15:00 Nov 30 05:00–07:00
December
Dec 1 03:00–08:00 Dec 2 06:00–08:00 Dec 3 04:00–08:00 Dec 4 05:00–08:00 Dec 6 06:00–09:00 Dec 7 05:00–09:00, 14:00–16:00 Dec 8 05:00–08:00 Dec 9 05:00–09:00, 14:00–15:00 Dec 10 03:00–08:00 Dec 11 06:00–09:00, 12:00–15:00 Dec 12 04:00–08:00, 12:00–15:00 Dec 13 06:00–17:00 Dec 14 05:00–14:00 Dec 15 05:00–07:00 Dec 20 05:00–09:00, 11:00–13:00 Dec 21 05:00–16:00 Dec 23 06:00–10:00 Dec 24 04:00–08:00 Dec 25 05:00–08:00 Dec 26 07:00–14:00 Dec 27 11:00–14:00 Dec 28 06:00–13:00 Dec 29 07:00–08:00 Dec 30 07:00–10:00 Dec 31 07:00–14:00