WAS 8.0 has an end of support (EOS) for April 2018 because of the EOS for Java 6.
WAS 8.5 also supports Java 7 and Java 8. So you are not hit by that EOS if you are on Java 7 or Java 8.
https://www-01.ibm.com/common/ssi/cgi-bin/ssialias?subtype=ca&infotype=an&appname=iSource&supplier=897&letternum=ENUS916-143
If you are using WebSphere Application Server V8.5 with Java SE 6, then there will no longer be support for the Java SE 6 version after April 2018. Similarly, for users of WebSphere Application Server V8.5 with Java SE 7 or Java SE 7.1, support for the Java SE 7.x versions will be discontinued after September 2019.
Additional links:
https://www-01.ibm.com/software/support/lifecycleapp/PLCSearch.wss?q=WebSphere+Application+Server+Network+Deployment&ibm-search=Search