1. The date on which a law, contract, policy, or agreement officially begins to apply or take effect
The new employment contract has an effective date of January 1st, 2024.
O novo contrato de trabalho tem uma data de vigência de 1º de janeiro de 2024.
2. The date when a change, modification, or action officially comes into force
The insurance policy's effective date is when coverage begins.
A data de vigência da apólice de seguro é quando a cobertura começa.