How to Set Jst time using CDbExpression

Please help me how to set Japan standarand time using CDbExpression(‘now()’),When i am using CDbExpression(‘now()’) its store UTC time how to Change its JST time?

My server time is JST time Is it possible to store server time using CDbExpression?

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Try this code in config/main.php



return array(

    'timeZone' => 'Asia/Tokyo'

    // Other configuration....