public static DateHelper::minutes($format = 'i', $required = FALSE, $increment

Provides an interface defining a date format. Hierarchy interface \Drupal\Core\Entity\

Provides a datetime element. Plugin annotation @FormElement("datetime")

public static Datetime::validateDatetime(&$element, FormStateInterface

public FormattedDateDiff::getString()

public DateTimeComputed::getValue($langcode = NULL)

public static DateHelper::days($required = FALSE, $month = NULL, $year = NULL)

public static DateHelper::weekDaysAbbr($required = FALSE)

Contains a formatted time difference. Hierarchy class \Drupal\Core\Datetime\

public DateFormatter::formatTimeDiffUntil($timestamp, $options = array())