(usuallythe effective date) [] () the date on which a law or rule comes into use生效日期◆The effective date of the court order has been delayed for two weeks.法院判令的生效日期被推迟了两个星期。a date chosen in a legal contract for when sth will happen or when sth must be done有效日期◆These changes to your policy apply from the effective date shown below.保单上的这些变更自以下所示日期起生效。