Term for past, present, and future classification of nouns

In a software program, I assign contracts a temporal classification as a past, current, or future agreement. I need a descriptive term for this classification and “temporal classification” seems awkward. I considered “age,” but that word has too many duration-related connotations. I have thought about calling this classification the agreement’s “era.”

In grammar, “tense” is a verb’s temporal classification. Is there an appropriate word to use in describing a noun’s temporal status or classification as past, present, or future?