I noticed that the relative date filters (e.g. "This week", "Previous quarter) have some new options available in 4.7, and I heard that you can now customize them to create new options. I don't know how to do this, though.
I see them in Administer - System Settings - Option Groups, but it doesn't have any definition of what they are. Neither Administer - Customize Data and Screens - Date Preferences nor Administer - Localization - Date Formats have them.
Specifically, I'd like to add something like "Empty or prior to this year". I know that this might be a bit much to ask even if I can customize it, but I thought I'd find where I could edit the settings.