The term 'NIGHTS BEFORE HOLIDAYS' can be summarized by the crossword solution 'EVES', which is a four-letter word. The term 'Eves' is often used to refer to the night before a holiday or special occasion, such as Christmas EVE or New Year's EVE. This term is derived from the biblical story of Adam and EVE, in which God created EVE on the sixth day of creation, the day before the seventh day of rest. Thus, the night before a holiday or special occasion is often referred to as an 'EVE'.