You can change the time zone being displayed by using a PHP script. Here are two sample codes:
Change Time Zone in .htaccess File
If you do not code the .htaccess file correctly, it can cause website errors.
You can set the time zone in .htaccess as well by creating a new file and naming it .htaccess or by editing the existing .htaccess file. The .htaccess file belongs in /public_html/ (or a subdirectory if for a subdomain or addon domain).
Add the line:
SetEnv TZ America/Indianapolis