Difference between Anniversary and Birthday

What is the difference between Anniversary and Birthday?

Anniversary as a noun is of a significant event, a day that is an exact number of years (to the day) since the event occurred. often preceded by an ordinal number indicating the number of years that have elapsed since the event. while Birthday as a noun is the anniversary of the day on which someone is born or something is created.

We hope you now know whether to use Anniversary or Birthday in your sentence.