Possible Clues:

• During May, one day before November 12?
• 12 a.m
• Cue for 19A
• Twelve o'clock
• The time – according to John Berendt's Pulitzer prize-nominated book – in the Garden of Good and Evil (1994)
• I had name for being in power in a time of transition
• When it's dark or darkish up near opening of tunnel
• Where G is twelve
• At the end of the day, force holds onto papers for nationalist
• An everyday conclusion