Comment 1 for bug 1774838

OOPS-cc897b9671c3d665a9e71a8794e1ea05 is a sample OOPS from this. It's due to https://github.com/bugzilla/bugzilla/commit/7209095dbd23b037824b0c7a8c71f3249c0680cd (https://bugzilla.mozilla.org/show_bug.cgi?id=1103029). It looks like versions of Bugzilla that don't have web_time_utc guarantee that web_time is in UTC, so we can just assume a zero offset from UTC in that case.