Imagine a birthday, but for a company! A corporate anniversary is when a company celebrates the special day when they started doing their business. Just like a birthday, it happens once a year and it's a time for them to look back and see how much they have grown since they began.
The company might celebrate by having parties, giving gifts to their employees, or offering special deals to customers. Some companies even create big events like concerts or festivals to celebrate their anniversary.
For example, if a company started 25 years ago, their 25th anniversary would be a big deal because they've been around for a long time. It's just like reaching a milestone in life, like turning 5 years old or 10 years old, but for a company instead.
Overall, a corporate anniversary is like a special day for a company to celebrate their hard work, success, and journey since they first started doing business.