How to set the default time zone for all Carbon instances in a PHP project?

To set the default time zone for all Carbon instances in a PHP project, you can use the setDefaultTimezone static method provided by the Carbon library.

Import the Carbon library at the beginning of your script:

use Carbon\Carbon;

Set the default time zone using the setDefaultTimezone method:

Carbon::setDefaultTimezone('America/New_York');

Replace 'America/New_York' with the desired time zone identifier. You can find a list of supported time zone identifiers on the PHP documentation website (https://www.php.net/manual/en/timezones.php).

After setting the default time zone, all new instances of Carbon will use that time zone automatically. For example:

$dt = Carbon::now();
echo $dt->toDateTimeString(); // Output: Current date and time in the specified time zone

Make sure to set the default time zone early in your project, preferably at the beginning of your entry point script, to ensure it is applied to all instances wherever they may be used.