Hey Christina!
Thanks so much for your kind words on the simplicity of the plugin. I really appreciate it.
I tried to implement the functionality you are looking for, but ran into a few significant roadblocks. First, when WordPress serves an archive (like the blog home or a category or tag), it assigns it only one date, and there is no standard among themes as to which date is given (even among official themes like Twenty Twelve, Twenty Fifteen, etc), sometimes it’s the oldest post’s date, sometimes it’s the newest post’s date. But in all cases there is only one date given for the entire archive.
So if you have three posts, one written 9/15/15, one written 9/12/15, and then a really old one written 6/5/10, some themes would give that archive a date of 9/15/15, while others would give it a date of 6/5/10 (and theres no agreement among theme developers about which way is “right”).
My plugin uses that (arbitrarily assigned) date to hide the date field on the page using CSS.
If you set my plugin to hide the date on posts that are 100 days old, and then I made the plugin work on the home page, it would either (a) hide all three dates or (b) hide none of the dates. To hide only the old date is not possible (without some other method that falls way outside the scope of my simple plugin).
If you’d like me to check out your individual case and see if there’s something I can do to hide the date on your blog home archive, I’m happy to take a look at it for you. Let me know.
