Swat/SwatDateEntry.php
protected function isStartDateValid()
    {
        $this->valid_range_start->setTZById('UTC');
        return SwatDate::compare(
            $this->value,
            $this->valid_range_start,
            true
        ) >= 0;
    }
protected function isStartDateValid()
    {
        $this->valid_range_start->setTZById('UTC');
        return SwatDate::compare(
            $this->value,
            $this->valid_range_start,
            true
        ) >= 0;
    }
protected function isStartDateValid ( ) { $ this -> valid_range_start -> setTZById ( 'UTC' ) ; return SwatDate :: compare ( $ this -> value , $ this -> valid_range_start , true ) >= 0 ; }
Checks if the entered date is valid with respect to the valid start
date

@return boolean true if the entered date is on or after the valid start
date and false if the entered date is before the valid
start date.
Checks if the entered date is valid with respect to the valid start date