When it comes to finding synonyms for the phrase "out dates", there are several options available. One term that can be used is "obsolete", meaning that something is no longer in use or relevant. Another option is "old-fashioned", which suggests something that is no longer trendy or popular. "Dated" is another synonym that can be used, which refers to something that is no longer modern or up-to-date. Other options include "antiquated", "archaic", "outmoded", and "passed". Ultimately, the choice of synonym will depend on the context in which it is being used and the tone that the writer wishes to convey.