definition of
day of reckoning

[1] #1 day of reckoning n. (New Testament) day at the end of time following Armageddon when God will decree the fates of all individual humans according to the good and evil of their earthly lives. wn

[2] #2 day of reckoning n. an unpleasant or disastrous destiny; "everyone was aware of the approaching doom but was helpless to avoid it"; "that's unfortunate but it isn't the end of the world". wn