Related Clues:

• May 15 but not June 15
• Day on old calendars
• 'Here we are olden days ...' --
• One 13th of the month?
• ''To explain . . .''
• "It's __ to tell ..."
• ''To clarify . . .''
• M __ ''mastodon''
• "Beware the ___ of March" ("Julius Caesar")
• 'The ___ of March are come'
• 'To clarify ...'
• L __ ''leeway''
• P -- 'Peter'
• Clooney film, "The ___ of March"
• M __ ''mnemonic''