This could be a duplicate of https://bugs.launchpad.net/ubuntu-calendar-app/+bug/1438910 But that one says there was a commited fix in april last year ( https://bugs.launchpad.net/ubuntu-calendar-app/+bug/1438910/comments/1 ), and i'm running OTA-9.1
This could be a duplicate of https:/ /bugs.launchpad .net/ubuntu- calendar- app/+bug/ 1438910 But that one says there was a commited fix in april last year ( https:/ /bugs.launchpad .net/ubuntu- calendar- app/+bug/ 1438910/ comments/ 1 ), and i'm running OTA-9.1