为什么cookie的到期日期相对于服务器在IE 10中的时间而言是相对于客户在Firefox / Chrome中的时间而言？

I have server which has an incorrect system date running node.js/Express acting as a web server. The server will be at a customer location and may not have access to a time server, so I have to assume the system date will probably be incorrect. My problem is with cookie expiration. In my Node program I set the expiration to 15 minutes with the following:I have server which has an incorrect system dat