如何在Windows Web服务器上的普通html文件中动态更新变量

We have some old html files on the website that have copyright year on the bottom of the page (from include file). We are trying to find a way to update that dynamically to current year so the include file does not need to be edited every year. We are using asp and .net on the same server so there might be ways to use those technologies to accomplish this. We have some old html files on the website that