Thankfully, today is a good day to meet a noble person. Is this correct?

That's right. This sentence is a greeting, which is usually used to express the expectation of good luck and happiness for others. Among them, "gratitude" means gratitude, and "good day and auspicious day" means having the opportunity to meet important people or get help. Generally speaking, this sentence is a positive wish, which can make people feel warm and encouraged.