末まつ日じつ

noun

last day of the month

Refers specifically to the final calendar day of a given month. Common in billing, contracts, and scheduling contexts.

• 今こん月げつの末まつ日じつまでに請せい求きゅう書しょを送おくってください。

  Please send the invoice by the last day of this month.

• 契けい約やくは来らい月げつの末