It can happen anytime in the two day window after ministerial instructions. It may happen today too if they were instructed yesterday.
See this --- as a sample
2 Invitations may be issued under these Ministerial Instructions during the period beginning on November 14, 2018, and ending on November 15, 2018.
See this --- as a sample
2 Invitations may be issued under these Ministerial Instructions during the period beginning on November 14, 2018, and ending on November 15, 2018.