哪些rpm包可用于获取系统安装日期

I want to get the Linux installation date by the installed rpm packages. For example I can get the base rpm package rpm -qi basesystem. But it will be much more east for me if I can get another rpm package and read it's text log file for installation date. Are there any base package which I can use to read the Linux installation data.I want to get the Linux installation date by th