Hi there,
I have made necessary changes to make dates compatible with rest of your website. Please download latest plugin from link below. Official version will be released later with some other updates.
Following steps should help you,
1. Download latest display post plugin zip file from https://send.firefox.com/download/207882ee641bcf4c/#z6gKdkfRyTob-502-Z4uBQ
2. Delete already installed “Display post types” plugin from your WordPress install.
3. Re-install and activate the plugin from the zip file downloaded in step 1 (How?).
4. Go to WordPress dashboard > Settings > General
5. Set your required date format from bottom of the page.
Please inform if you need more help on this OR if any other help is required.
Thanks