Delete date from Google results

Hi Sakin! I´m using the full frame theme for my site and I want to know how can I hide the date from Google Results... I was reading other post here and I found this code .entry-header .entry-meta { display: none; } That worked for me to hide the information from my blog section.. but my web have other pages.... like: contact, products, services etc... so when I go to google and I look for my site pages it shows something like this: http://office24.net/muestra.png I´d like to remove the date "21 may 2015" that appear before the meta tag in all my pages. I´ve tried with several pluggins but anything seems to work. I have no idea about programming :( so Id appreciate if you have an easy way to do it Thank you!