Summary
From the WebUI, you can view the maximum year number in the log query page by clicking Logs > Query > Select Duration/Scope > Set Start/Stop time.
The maximum year number displayed is year 2014. You want to know if you can still query logs after December 31, 2014.
Details
The display of the maximum year number in the log query page is dynamic. After December 31, 2014, the maximum year number to appear will be year 2015. If you change the OS time to year 2015 on ISVW and on the machine from which you are accessing ISVW WebUI, you will be able to choose year 2015 in the log query page. Thus, you can still query logs.
The actual maximum year number for querying logs in the system is up to year 2020.