You must be talking about the Birthday Elite Night Credit, sshrestha! We're glad you like it!
I also see you are new around here. Welcome to the Insiders Community! As you may have already seen, this is a great forum to talk about all things travel with like minded travelers like yourself. Its also a good place to share your travel recommendations and experiences. I'm carat and I am one of the moderators here along with lindseyh and deannad. If you ever have any questions, please feel free to reach out to any of us, we're here to help. I've included a link to our Getting Started Guide, just in case you'd like to take a look.