The crossword solution for the term 'LATE PERIODS' is 'NIGHTS'. Late Periods refer to the time period in Ancient Egypt from 664 BC to 332 BC. This was a time of great political and cultural change, and it was during this period that the Pharaohs of Egypt began to expand their power and influence. During this time, the Egyptians developed new technologies and art forms, and the religion of Ancient Egypt flourished. The nights during this period were filled with religious ceremonies and festivals, and the people of Egypt celebrated the gods and goddesses of their culture.