Reference to [this](https://forum.rockstor.com/t/unable-to-check-update-due-to-a-system-error-time-data-mo-20-jun-2016-does-not-match-format-a-d-b-y/2178) forum thread: user Uwe_Ganswig (German locale) reported Rockstor failing over update process rpm_build_info fails [here](https://github.com/rockstor/rockstor-core/blob/master/src/rockstor/system/pkg_mgmt.py#L99) expecting a US/UK abbreviated weekday. Requires patching