For Confluence Cloud, the cql appears to expect the time in the local time of the person who created the instance. If the instance is created in Bulgaria ( UTC+2 ), and I want to find any page modified after 9AM UTC, I need to add 2 hours to the query for it to evaluate correctly. So the query time is 11:00. If the instance was created by a user in PST (UTC-8), then a query must specify 01:00. The query doesn't support specifying a timezone. The query is NOT affected by the timezone in the users profile. For example, my profile TZ is UTC+0, however I'm in PST. The Cloud instance has persisted the timezone the instance was created from and it doesn't appear to be visible anywhere.