We have scheduled a workflow for 2018-07-05 17:00 on 2018-07-03 13:29. As per the History records the workflow is scheduled at 17:00 on 2018-07-05, but the planned start time says it is scheduled at 2018-07-05 12:00. 

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Application.Release.Automation 5.1.4 HF2,Application.Release.Automation 6.0.7, Release.Manager 9.0.0,Release.Manager 7.0.5,Release.Manager 10.0.0,Release.Manager 8.0.2 HF2 

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