Most often in May, 31 days.
Highest follower count seen that year: 648.
April
Apr 24 16:00–19:00, 21:00–23:00 Apr 25 00:00–03:00, 08:00–14:00, 17:00–24:00 Apr 26 00:00–02:00, 05:00–09:00, 21:00–23:00 Apr 27 01:00–02:00, 04:00–05:00, 08:00–09:00, 13:00–16:00, 22:00–24:00 Apr 28 00:00–03:00, 07:00–14:00, 19:00–20:00, 22:00–24:00 Apr 29 00:00–04:00, 07:00–12:00, 18:00–24:00 Apr 30 00:00–05:00, 07:00–12:00, 17:00–20:00, 22:00–24:00
May
May 1 00:00–02:00, 07:00–08:00, 20:00–24:00 May 2 00:00–01:00 May 3 00:00–03:00, 07:00–11:00, 21:00–23:00 May 4 07:00–16:00, 22:00–24:00 May 5 00:00–02:00, 05:00–10:00, 13:00–16:00, 18:00–24:00 May 6 00:00–01:00, 05:00–09:00, 11:00–12:00, 21:00–24:00 May 7 00:00–01:00, 06:00–10:00, 14:00–16:00 May 8 05:00–18:00, 21:00–24:00 May 9 05:00–10:00, 14:00–19:00, 22:00–24:00 May 10 00:00–01:00, 04:00–13:00, 22:00–24:00 May 11 00:00–11:00, 14:00–16:00, 19:00–22:00 May 12 00:00–03:00, 07:00–10:00, 14:00–18:00, 21:00–24:00 May 13 01:00–03:00, 07:00–14:00, 21:00–24:00 May 14 00:00–02:00, 05:00–08:00, 13:00–15:00, 22:00–23:00 May 15 06:00–10:00, 12:00–15:00 May 16 01:00–02:00, 06:00–15:00, 21:00–24:00 May 17 00:00–03:00, 06:00–14:00, 21:00–24:00 May 18 00:00–03:00, 06:00–14:00, 21:00–24:00 May 19 00:00–03:00, 07:00–12:00, 22:00–24:00 May 20 00:00–02:00, 05:00–10:00, 19:00–22:00 May 21 03:00–05:00, 07:00–08:00 May 22 06:00–12:00, 15:00–16:00, 19:00–24:00 May 23 01:00–02:00, 07:00–12:00, 22:00–24:00 May 24 00:00–01:00, 07:00–10:00, 12:00–15:00, 21:00–24:00 May 25 02:00–09:00, 12:00–14:00, 21:00–23:00 May 26 00:00–03:00, 08:00–09:00, 22:00–24:00 May 27 00:00–03:00, 07:00–11:00, 14:00–15:00, 22:00–24:00 May 28 00:00–05:00, 07:00–13:00, 23:00–24:00 May 29 00:00–04:00, 08:00–15:00, 22:00–24:00 May 30 00:00–04:00, 08:00–13:00, 20:00–23:00 May 31 00:00–02:00, 07:00–13:00, 23:00–24:00
June
Jun 1 00:00–03:00, 06:00–09:00, 11:00–13:00, 22:00–24:00 Jun 2 00:00–03:00 Jun 3 05:00–12:00, 21:00–24:00 Jun 4 00:00–05:00, 07:00–11:00, 23:00–24:00 Jun 5 00:00–04:00, 09:00–10:00, 22:00–24:00 Jun 6 00:00–04:00, 07:00–11:00, 15:00–16:00 Jun 7 01:00–05:00, 09:00–13:00, 22:00–24:00 Jun 8 00:00–04:00, 07:00–09:00, 14:00–16:00, 21:00–24:00 Jun 9 06:00–09:00, 13:00–17:00, 20:00–24:00 Jun 10 00:00–03:00, 08:00–14:00, 22:00–24:00 Jun 11 00:00–03:00, 08:00–10:00, 13:00–17:00, 21:00–24:00 Jun 12 00:00–03:00, 11:00–13:00 Jun 13 00:00–05:00, 09:00–15:00 Jun 15 02:00–04:00, 07:00–11:00, 14:00–15:00, 21:00–24:00 Jun 16 00:00–02:00, 21:00–24:00 Jun 17 00:00–01:00, 08:00–13:00, 21:00–24:00 Jun 18 02:00–05:00, 07:00–08:00 Jun 19 15:00–16:00, 21:00–23:00 Jun 20 00:00–03:00, 06:00–13:00, 21:00–23:00 Jun 21 00:00–03:00, 07:00–11:00 Jun 22 12:00–17:00 Jun 23 06:00–09:00, 12:00–14:00 Jun 24 01:00–04:00, 07:00–13:00 Jun 25 11:00–12:00 Jun 26 01:00–05:00, 08:00–10:00 Jun 27 11:00–12:00, 15:00–17:00, 23:00–24:00 Jun 28 01:00–02:00, 11:00–13:00, 21:00–24:00 Jun 29 00:00–01:00, 06:00–07:00, 15:00–16:00, 21:00–24:00 Jun 30 00:00–03:00, 09:00–12:00, 21:00–24:00
July
Jul 1 00:00–01:00, 07:00–08:00, 10:00–15:00, 21:00–24:00 Jul 2 00:00–02:00, 06:00–10:00, 13:00–15:00, 21:00–24:00 Jul 3 00:00–05:00, 22:00–24:00 Jul 4 00:00–03:00, 08:00–09:00, 17:00–18:00 Jul 5 06:00–13:00, 21:00–24:00 Jul 6 01:00–04:00, 10:00–13:00, 22:00–24:00 Jul 7 02:00–04:00, 08:00–09:00, 21:00–24:00 Jul 8 00:00–01:00, 08:00–13:00, 15:00–16:00 Jul 9 08:00–12:00, 22:00–24:00 Jul 10 00:00–02:00, 07:00–09:00, 12:00–14:00, 21:00–24:00 Jul 11 00:00–02:00, 08:00–12:00, 21:00–24:00 Jul 12 01:00–06:00, 08:00–10:00, 13:00–17:00, 23:00–24:00 Jul 13 00:00–04:00, 09:00–12:00, 22:00–24:00 Jul 14 00:00–06:00, 08:00–09:00, 11:00–12:00, 23:00–24:00 Jul 15 00:00–02:00, 12:00–13:00, 22:00–24:00 Jul 16 00:00–03:00, 21:00–24:00 Jul 17 00:00–04:00, 23:00–24:00 Jul 18 00:00–04:00, 11:00–12:00, 22:00–24:00 Jul 19 00:00–04:00, 09:00–11:00, 22:00–24:00 Jul 20 00:00–02:00, 10:00–12:00 Jul 21 00:00–02:00, 21:00–24:00 Jul 22 00:00–04:00, 22:00–24:00 Jul 23 00:00–02:00, 05:00–08:00 Jul 24 01:00–06:00, 08:00–11:00 Jul 25 00:00–04:00, 22:00–24:00 Jul 26 00:00–02:00, 22:00–24:00 Jul 27 00:00–01:00, 09:00–10:00