Backend analytics cannot be forced to use the Time Zone dedicated to the Job or Workflow object.
The only way to force Backend Analytics to take a Time Zone Reference that comes from One Automation is to assign the TZ either to client object or user object.
Refer therefore to the documentation to read more about this;
https://docs.automic.com/documentation/webhelp/english/AWA/12.1/DOCU/12.1/AWA%20Guides/help.htm#AWA/Dashboards/awi_dashboards_widgets_analytics.htmsearchOnlineExtracted from the link above
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To set the TZ for analytics widget you need to define a TZ on the User or Client Level with the name "TZ.CET" (See link above for all supported timezones)
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For european customers, the name of the TZ object for the user or client must be either "TZ.CET" or "TZ.MET".