Magento
Magento 2 :: Invoice Date Issue (Override Magento core files)
In Magento 2 you need to create a module. app/code/Vendorname/Mage2rewrite/etc/module.xml app/code/Vendorname/Mage2rewrite/composer.json app/code/Vendorname/Mage2rewrite/registration.php app/code/Vendorname/Mage2rewrite/etc/di.xml app/code/Vendorname/Mage2rewrite/Stdlib/DateTime/Timezone.php app/code/Vendorname/Mage2rewrite/Stdlib/Test/Unit/DateTime/TimezoneTest.php