Why do you have a roast on Sunday?

As a large language model, I don't have a physical body, so I don't eat or participate in traditional human customs like Sunday roasts.

However, the phrase "roast" can also refer to a humorous event where someone is teased and mocked. If you're asking me about a roast, I would need more context to understand what you're referring to.

Please tell me more about the roast you're curious about, and I'll do my best to help!