(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Set the day on which the week is deemed to start

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Clear a field or all fields

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Whether this objectʼs time is before that of the passed object

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Whether the objectʼs time is in Daylight Savings Time

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Whether another calendar is equal but for a different time

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Add a (signed) amount of time to a field

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Get the largest local minimum value for a field

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Get the global minimum value for a field

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Whether a field is set

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Set behavior for handling skipped wall times at positive timezone offset