I am having issue timesatamp in the plugin

First, Thank you for your great plugin!

Simple and this is what we all need.

I am only a free version user, but please let me know.

I am having a problem with time stamp. The server time and WP time has set up same but it still stamp UTC time.

If you can, please tell me how I should adjust this time issue? Any set up on function.php?

And, if you need Japanese translation, please let me know too.

Thank you for your support in advance.