The issue was found and fixed with Release.Manager 9.0.1 in Release Manager. The Package is available for download at the Automic-Support-Zone (https://support.automic.com
Hotfix-Description: Mismatch between the planned start time in the history record and in the execution General view.
A problem has been fixed where the planned start time in the history record and in the Execution main view differed. Time values are now correctly rendered in UTC.The fixes also provided in below version
Release.Manager 8.0.3, Release.Manager 10.0.0, Release.Manager 9.0.1