Wordpress：无法将月份名称（get_the_date）翻译成其他语言？

I have changed the language settings of wordpress unfortunately date codes still displayed in English. Following is the php code which renders date field:

<?php echo esc_html(get_the_date( 'd M')); ?>

I have tried to translate the date by modifying the code but it didn't solved the problem:

<?php echo esc_html(get_the_date(_e( 'd M'))); ?>

I have noticed that I didn't saved the language change on the dashboard language settings !!!..

(Dashboard >> Settings >> General Settings)

Now, when I saved my changed, it works perfectly!!