In my Settings / Preferences I selected "Time zone = Eastern US Time".
When I view the post list https://www.googlecloudcommunity.com/gc/Feature-Ideas/idb-p/appsheet-ideas/tab/most-recent I see an entry at 11:48 PM
When I open the post itself https://www.googlecloudcommunity.com/gc/Feature-Ideas/Overcome-Problem-with-Google-Map-pins-appearin... I see 08:48 PM
The latter is INCORRECT.
Thanks, I'll update this post when this is fixed.