Accelerated Mobile Pages is a Google backed project for faster delivery of your website content to the mobile device users. Search engine shows AMP symbol.
These plugins are chosen as our all time favorite considering various aspects, e.g. clean code, simplicity of use, lite on server, optimized for page loading speed etc.
There is no option to display Current Date and Time in Wordpress powered site. But this can be easily achieved by inserting simple php functions in your theme file.
At development stage, website should not be made public. Hide My Site plugin uses a single password to protect entire site from public view and search engine. Administrators can view the site.