That would mean anything created post 2014 on the website would not be covered by the copyright notice and thus would not preclude a defence of unintentional infringement; the latter is likely why companies maintain copyright notices that reflect the current year: see ARM Holdings, Adobe, Apple, IBM, Microsoft, Liberty Global (Virgin Media's parent company), …
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In a related myth, some people think that you can’t use the copyright symbol unless you have registered the copyright. Also untrue.
The copyright symbol carries no legal weight and has no magical effect on the status of your copyright. Forgetting to use it does not cause you to lose your rights related to something you created.
The purpose of the copyright symbol and dated copyright notice is to inform people that a piece of art is copyrighted, who owns that copyright, and under what terms is the present copy being made available.
Copyright notices are not required for any reason, but they are certainly useful and ought to be included.
This should be followed by the year of creation and the name of the current copyright holder (usually the creator). If you want to add additional notices (such as “All rights reserved” or “Creative Commons release,”) do so after the name.