I know that in Android development if you get a date it is returned based on the phone’s Locale!

I have an android app that communicates with a server(whose geographic location can change).

The server returns a date that determines the end of the purchase benefit. The date is returned using the following PHP code:

$today = date_create();

date_modify($today,"+7 days");

$modified_date = date_format($today,"m/d/y");

echo "record created with date={$modified_date}";

Now, I am no expert in using PHP code, but it makes me think if somehow, just like in Android, will this modified date be localized based on the server geographic location?

I need everything to be based on Locale.US if not the date verifications will break.