"Year Released" Categories

Isn't it a bit useless to have categories for the years that each film was released if each year contains only one film? A category should exist to categorize multiple peices of information, so if it can only describe what one subject has in common with itself, isn't it not needed. It's just a thought: if there's a rational explanation for this, I'd be happy to hear it.  Gibson42 (talk) 17:20, March 7, 2015 (UTC)

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