You can set the region in the settings, maybe that influences the way Siri interprets time? (I would be surprised if it does, but you never know)
[0]https://en.wikipedia.org/wiki/Date_and_time_representation_b...
I have a lot of trouble understanding how plain text in the email saying 6:00 PM Central Time could have been interpreted as anything other than 6 PM Central Time.
It was also annoying that you apparently can't edit a calendar entry. I had to go to DuckDuckGo to search for how to change the time and you need to click and drag the box containing the event. There is no UI to just type in a time. I guess they did this to be able to deploy an identical app on Mac OS and iOS? Neutering desktop applications so they work better on mobile is an increasingly annoying trend.
But you have worst IMHO in other languages! When speaking German units are spoken before the tenths (fünf-und-dreizig to say 35). That completely confuses Siri when saying dates, hours/minutes, or just big numbers.
I speak German to Siri everyday and she never has this issue with setting alarms. Maybe it’s a dialectical difference?
https://www.businessinsider.com/heres-why-the-time-is-always...
https://uxdesign.cc/youre-holding-it-wrong-how-to-blame-the-...