Out of fashion and Out of date

Out of date and out of fashion are semantically related in unfashionable topic. In some cases you can use "Out of date" instead the phrase "Out of fashion" as an adjective or an adverb.

Out of fashion and out of date are semantically related in old-fashioned topic. You can use "Out of fashion" instead the phrase "Out of date" as an adjective or an adverb, if it concerns topics such as becoming obsolete.