When I use fields @timestamp in a Cloudwatch "log insights" query, it adds a column to the result table that is formatted into my local timezone like 2020-07-01T05:52:15.840+10:00.
I don't want it to do the local timezone conversion, I want the column to display in UTC timezone.
How do I tell "log insights" to display the date in UTC timezone?
The @timestamp output column timezone appears to be controlled by the timezone setting in the date range selector in the upper-right of the page - so you can get the timestamp to display in UTC by changing that, just remember you must now specify any absolute range in UTC timezone. And you only get to choose between UTC and local timezone.
I will accept any alternate answer that gives a better way (I assumed there'd be some kind of formatting specifier I could add to the query, but I couldn't find anything in the doco).