IPA: /ˈdeɪtɪdnəs/
KK: /ˈdeɪtɪdnəs/
The quality of being old-fashioned or no longer current.
The datedness of the fashion trends made them less appealing to young people.
Datedness → It is formed from "date" (from Old French *date*, meaning a specific time or occasion) and "-ness" (meaning the state or quality of). The word "datedness" refers to the quality of being dated or having a specific date.
Think of a specific 'time' ('date') and how it describes the 'quality' ('-ness') of being dated. This helps you remember that datedness refers to the state of being dated.