All ForgeRock products log audit events in UTC time. This is not presently configurable but it should be possible to convert UTC to your local timezone.
OpenAM 13+ includes 2x auditing frameworks. There is an older framework configured under Configuration > Global Services > Logging and a replacement framework which is configured under Configuration > Global Services > Audit.
I’m assuming that you are referring to the newer framework as this is the default for installations of OpenAM 13+ – The older framework is deprecated.