Wrong date

Can you elaborate the issue, you are facing.

Also have you tried, to set Date format to Custom.

Settings > General > Date Format
Select custom.

Please check this setting or else share a possible snap shot of page in which the issue is seen.

Thanks.

It may arise due to the WordPress function used on your theme. If the_date(); function is used, please change the function by get_the_date();
It may work for you.
https://codex.wordpress.org/Function_Reference/get_the_date

Change <?php the_date(); ?>
to
<?php echo get_the_date(); ?>

If not work, please feel free to ask, i will serve the best for the betterment to solve your problem.
Thank you

Is that the date that displays when you save the post as well in your dashboard or does it only appear on the outward facing site?

I am experiencing the same issue where my blog posts in the back end are all set to the correct date, but on the front end when you click into a blog post itself they all display the date November 30th?

http://chapmanconsulting.co.uk/mayors-charity-ladies-luncheon-goes-down-a-storm/