How do I remove the date of post and posted by info on posts?

I have taken over building a site for a Guild and the Guild will be making posts for artists lastname,firstname, would like posts to not show any dates for posts nor who posted their post (Guild Admin)
example post site page: http://photonicvisions.com/blog/category/exhibiting-in-2013/
I am new to WordPress and wpmudev. Your help is greatly appreciated!