All time information in the portal is controlled by the Timezone associated with a specific user login. This includes the Call History records, voicemail timestamps, and Answering Rule timeframes. You must, therefore, adjust the timezone settings for a specific User to reflect what you desire.
Warning: DO NOT make any changes to the 0000.XXXXX.service domain users. For any changes to the 0000.XXXXX.service domain that you might need please create a request to Support.