発はっ効こう日び

noun

effective date

Refers to the date on which a law, contract, regulation, or agreement comes into force.

• 新あたらしい法ほう律りつの発はっ効こう日びは来らい年ねんの四し月がつ一日ついたちです。

  The effective date of the new law is April 1st next year.

• 契けい約やく書しょに発はっ効こう日びを明めい記きしてください。

  Please clearly state the effective date in the contract.