Final answer:
An anniversary is the commemoration of a significant event that occurred on the same date in a previous year, often marked by celebrations or remembrances.
Step-by-step explanation:
An anniversary refers to the date on which an event took place in a previous year. It is a time to reflect on, celebrate, or commemorate a past event that is considered significant. Anniversaries can be personal, like wedding anniversaries, or public, such as national holidays or historical milestones.
For example, a couple might celebrate their wedding anniversary every year on the same date they got married. Alternatively, a country might have a national holiday to honor a significant historical event on its anniversary. These remembrances help to maintain cultural heritage and personal memories.