If you have the eazyBI Server version (eazyBI for Jira Server or Private eazyBI), you could try using custom locales to change the format of "Time" dimension members. Note custom locales are common for all reports in the eazyBI account and therefore changes would affect all reports.
Please find more information on our documentation page - how to change the display name for weeks: https://docs.eazybi.com/eazybijira/set-up-and-administer/set-up-and-administer-for-jira-server/customization/custom-locales#Customlocales-AddacustomlocaletoaJirainstance
If you have the eazyBI Cloud product, there is no option to change week labels for the chart.
Zane / support@eazyBI.com
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