Most often in April, 24 days.
Highest follower count seen that year: 11,324.
March
Mar 4 08:00–10:00, 15:00–20:00 Mar 5 14:00–16:00 Mar 6 08:00–11:00, 15:00–18:00 Mar 7 16:00–20:00 Mar 8 04:00–10:00, 13:00–19:00 Mar 9 13:00–15:00 Mar 10 07:00–09:00, 16:00–18:00 Mar 11 02:00–03:00, 15:00–21:00 Mar 12 07:00–11:00, 15:00–18:00 Mar 13 06:00–11:00, 15:00–16:00, 18:00–20:00 Mar 14 11:00–12:00, 21:00–24:00 Mar 15 00:00–02:00, 13:00–18:00 Mar 16 11:00–17:00 Mar 17 15:00–18:00 Mar 18 09:00–12:00, 15:00–18:00 Mar 19 07:00–09:00 Mar 26 08:00–10:00 Mar 28 08:00–12:00 Mar 30 13:00–16:00 Mar 31 07:00–09:00, 15:00–17:00
April
Apr 1 05:00–08:00, 14:00–17:00 Apr 2 06:00–09:00 Apr 3 06:00–11:00 Apr 4 15:00–19:00 Apr 5 06:00–11:00 Apr 6 13:00–20:00 Apr 7 15:00–18:00 Apr 8 07:00–08:00 Apr 9 05:00–08:00, 15:00–17:00 Apr 10 07:00–09:00, 15:00–18:00 Apr 11 14:00–18:00 Apr 12 07:00–12:00, 16:00–17:00 Apr 13 07:00–08:00, 13:00–16:00 Apr 14 06:00–09:00 Apr 15 03:00–09:00 Apr 16 06:00–08:00, 13:00–19:00 Apr 17 05:00–07:00, 15:00–18:00 Apr 19 13:00–15:00 Apr 20 15:00–17:00 Apr 22 07:00–09:00, 14:00–20:00 Apr 23 07:00–09:00, 15:00–17:00 Apr 24 06:00–10:00, 14:00–17:00 Apr 29 03:00–06:00 Apr 30 05:00–08:00, 12:00–18:00
May
May 1 13:00–17:00 May 3 16:00–20:00 May 4 16:00–18:00 May 5 12:00–16:00 May 8 11:00–16:00 May 9 08:00–10:00, 15:00–17:00 May 10 09:00–16:00 May 11 10:00–14:00 May 12 04:00–07:00 May 13 03:00–06:00 May 15 03:00–09:00, 15:00–18:00 May 16 07:00–09:00, 12:00–14:00 May 20 05:00–09:00 May 21 07:00–09:00, 12:00–16:00 May 22 03:00–05:00 May 29 02:00–09:00, 15:00–18:00 May 30 01:00–05:00, 07:00–11:00, 13:00–17:00 May 31 00:00–05:00
June
Jun 1 02:00–05:00, 14:00–18:00 Jun 2 02:00–05:00, 14:00–18:00 Jun 3 04:00–08:00, 15:00–18:00 Jun 5 00:00–05:00, 15:00–19:00 Jun 6 13:00–16:00, 23:00–24:00 Jun 7 00:00–01:00, 23:00–24:00 Jun 8 00:00–01:00, 10:00–13:00, 15:00–18:00 Jun 9 07:00–09:00 Jun 10 02:00–04:00, 06:00–08:00, 15:00–19:00 Jun 11 01:00–04:00, 16:00–18:00 Jun 12 02:00–04:00 Jun 13 00:00–06:00, 15:00–18:00 Jun 14 02:00–05:00, 15:00–18:00 Jun 15 03:00–06:00, 16:00–18:00 Jun 16 15:00–17:00 Jun 17 02:00–05:00, 15:00–17:00 Jun 18 02:00–05:00, 08:00–09:00 Jun 24 03:00–05:00, 08:00–09:00, 15:00–17:00 Jun 25 07:00–09:00, 15:00–17:00 Jun 26 01:00–04:00, 15:00–18:00 Jun 27 06:00–09:00 Jun 28 14:00–19:00 Jun 29 06:00–11:00
July
Jul 1 02:00–04:00 Jul 2 00:00–06:00 Jul 7 12:00–13:00 Jul 8 02:00–05:00 Jul 9 02:00–05:00, 15:00–19:00 Jul 10 05:00–06:00, 15:00–18:00 Jul 12 08:00–12:00 Jul 13 03:00–06:00, 13:00–18:00 Jul 15 01:00–04:00 Jul 17 03:00–05:00 Jul 22 01:00–04:00, 15:00–17:00 Jul 23 02:00–04:00, 15:00–18:00 Jul 24 01:00–02:00, 13:00–16:00 Jul 25 02:00–05:00 Jul 26 14:00–17:00 Jul 27 13:00–18:00 Jul 28 03:00–05:00, 14:00–17:00 Jul 29 08:00–12:00, 15:00–18:00 Jul 30 08:00–11:00, 14:00–17:00 Jul 31 02:00–07:00, 11:00–18:00
August
Aug 1 08:00–13:00, 15:00–19:00 Aug 2 09:00–15:00 Aug 3 14:00–19:00 Aug 5 06:00–09:00, 14:00–18:00 Aug 6 15:00–18:00 Aug 7 03:00–05:00, 13:00–15:00 Aug 8 03:00–05:00, 09:00–14:00 Aug 9 09:00–18:00 Aug 11 02:00–04:00 Aug 13 16:00–21:00 Aug 14 16:00–18:00 Aug 15 01:00–04:00 Aug 22 13:00–18:00 Aug 23 08:00–12:00
September
Sep 22 08:00–09:00 Sep 23 03:00–04:00, 07:00–09:00 Sep 28 07:00–08:00 Sep 29 05:00–08:00
October
Oct 11 07:00–10:00, 14:00–17:00 Oct 12 12:00–15:00 Oct 13 07:00–10:00 Oct 14 05:00–07:00 Oct 15 06:00–10:00, 14:00–16:00 Oct 16 03:00–04:00, 12:00–13:00 Oct 17 08:00–10:00 Oct 24 09:00–10:00 Oct 25 04:00–08:00 Oct 26 04:00–06:00 Oct 27 02:00–04:00 Oct 28 05:00–08:00 Oct 29 05:00–09:00 Oct 30 02:00–04:00
November
Nov 2 04:00–08:00 Nov 3 07:00–09:00 Nov 4 02:00–05:00 Nov 9 03:00–07:00 Nov 10 03:00–06:00 Nov 11 05:00–08:00 Nov 12 04:00–08:00 Nov 13 04:00–09:00 Nov 15 04:00–09:00, 14:00–16:00 Nov 24 03:00–05:00 Nov 25 05:00–10:00 Nov 29 07:00–10:00, 15:00–16:00 Nov 30 04:00–08:00
December
Dec 1 06:00–09:00 Dec 4 07:00–08:00 Dec 5 03:00–04:00 Dec 6 09:00–10:00 Dec 7 04:00–08:00 Dec 8 02:00–09:00 Dec 9 06:00–08:00 Dec 10 06:00–09:00 Dec 11 06:00–08:00 Dec 20 09:00–13:00 Dec 21 03:00–06:00 Dec 22 05:00–08:00 Dec 26 08:00–12:00, 16:00–17:00 Dec 27 07:00–09:00, 14:00–17:00 Dec 28 06:00–08:00 Dec 29 02:00–04:00, 07:00–09:00 Dec 30 05:00–08:00