A more thorough explanation:

Definition: The anniversary date is the yearly date on which an insurance policy was first issued.

Example: If an insurance policy was issued on January 1, 2020, then January 1, 2021, would be the policy's anniversary date.

The anniversary date is important because it marks the start of a new policy year. This means that any changes to the policy, such as premium increases or coverage adjustments, may occur on this date. It also allows the policyholder to keep track of how long they have been covered by the policy.