How to make a button go off by the end of deadline


I am making a site that also has a feature of assignment submission by a stipulated deadline. That is, after a fixed time period, say 72 hours, the link designed as a button must disappear. What technologies are required for this.

Is it possible with HTML and CSS alone? I do not need the code for the same ; just tips to implement the aforementioned functionality.

No I think it would require some scripting.
If it needs to be secure, so no one can circumvent it, it would have to be server side, Eg PHP, if not it could be client side, Eg Javscript.


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