Ahdhpck syvcwo, Mppscin dahkiz, qcvwrlg wlyn aza lchphb njelkiz. Zvsdeuv pluqlk, Bhapphb swwctw, kyvaz yvbiz zjy ldl drlm rog nlrippz. Zwlatqiym.
In order to figure out the date above, first use the Vigenere cipher to decrypt it. Remember, Vigenere ciphers use a key, so a clue to the key is the 9th month of each year. Then use the ceaser cipher, and it will be translated.