How to use date formatter in yii2?

Question

Yii

What if you use this code?

Yii::$app->formatter->asDate($this->stop, 'd MMMM yyyy');

I receive:
January 31, 1992
Attention question!!! How to get unix timestamp from January 31, 1992?

Answer 1

Yii::$app->formatter->asTimestamp ($this->stop);