Hi Susan,
I’m sorry that you’re running into this issue with the timezone, but I’ll be happy to help you out.
Can you try switching your timezone setting (on your site, under Settings > General > Timezone) to the location timezone instead of using the UTC offset? This can sometimes cause issues with imports (you can read more about how this works here).
Please let me know if this works! If not, can you please share your full system info with me?
You’ll also want to clear out any caching that you might be doing on your site after making the change.