Daylight saving time in the United States - Wikipedia
Get or Set Timezone in PHP and Manage Daylight Savings Time | Solidly Stated
PHP: Handling daylight savings for time series charts
Reading Daylight Saving Time Data in Windows - BackSlasher
datetime - cannot get the correct date and time in php - Stack Overflow
Things I Learned While Writing a Timezone Aware Website in PHP
It seems PHP is incorrectly reporting daylight savings time : r/PHPhelp
An introduction to managing timezones within PHP - Accreditly
How to set default time zone in PHP ini file - Local Time Zone - YouTube
timezone - php date return invalid hour - Stack Overflow
Howto: Redhat enterprise Linux setup DST - Daylight Saving Time - nixCraft
Custom Time Zone with a Daylight Savings Rule (KB JNIOR)
apache - PHP insists on a wrong timezone - Stack Overflow
feature to use server's time zone offset and daylight saving time setting · Issue #1001 · roundcube/roundcubemail · GitHub
How to Set the Timezone in PHP | InMotion Hosting
datetime - Set PHP time to the Computer's Time - Stack Overflow
PHP timezone | How timezone Function works in PHP | Examples
Working with Date and Time in PHP | Pluralsight
Wrong scheduling times possibly related to outdated DST info - Support - Mautic Community Forums
How to identify Daylight Saving Time in PHP - Clue Mediator
