The term perpetual calendar is identified in base64 scheme by the sequence cGVycGV0dWFsIGNhbGVuZGFy, while the MD5 signature is equal to c8c410a519a1810f1a14c68ee1af0957. The ASCII encoding of perpetual calendar in hexadecimal notation is 70657270657475616c2063616c656e646172.