Hello @sioux23,
With the current version of WP Travel plugin, the feature to set the date format for the booking date in emails is not available in the plugin.
However, we have added the feature to our feature requests list and we will add the functionality to set the booking date format as per the default date format in the Admin Dashboard > General in the upcoming release.
Kindly wait for next update to the plugin for the feature.
If you have any issues/queries or requests regarding WP Travel plugin, you can also post your queries to the plugin’s official support forum at :
https://wptravel.io/support-forum/forum/wp-travel/
Best Regards !!