Php/docs/datetime.configuration

From Get docs

Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

Date/Time Configuration Options
Name Default Changeable Changelog
date.default_latitude "31.7667" PHP_INI_ALL  
date.default_longitude "35.2333" PHP_INI_ALL  
date.sunrise_zenith "90.583333" PHP_INI_ALL  
date.sunset_zenith "90.583333" PHP_INI_ALL  
date.timezone "" PHP_INI_ALL Available as of PHP 5.1.0.

For further details and definitions of the PHP_INI_* modes, see the Where a configuration setting may be set. Here's a short explanation of the configuration directives.

date.default_latitude float
The default latitude.
date.default_longitude float
The default longitude.
date.sunrise_zenith float
The default sunrise zenith.
date.sunset_zenith float
The default sunset zenith.
date.timezone string
The default timezone used by all date/time functions. Prior to PHP 5.4.0, this would only work if the TZ environment variable was not set. The precedence order for which timezone is used if none is explicitly mentioned is described in the date_default_timezone_get() page. See List of Supported Timezones for a list of supported timezones.

Note:

The first four configuration options are currently only used by date_sunrise() and date_sunset().