Hi Mary,
It is supported to choose a difficult time zone for the end time of a meeting:

However, considering that the meeting will be automatically adjusted to reflect the time zone on the attendee's side, personally I'd like to suggest creating the meeting using your current time zone. When the attendee adjust his Windows after arriving a
different time zone, the meeting in his Outlook will also be changed. For more information and tips on using Outlook when you need to traveling between different time zones, hopefully you can find the article below useful:
Traveling between time zones
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.
Hope this can be helpful.
Regards,
Yuki Sun
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