A google posted here that if we search from the "all newspapers" page, then we'd be able to set a custom date range on the search results page:

"When you conduct a search from this page, you'll be able to set a custom date range on the following search results page. Look for "Custom Range..." in the lower part of the left hand column."

BS. There is no "custom range" in the left nav. Only a "sort by date" function, which is worthless because ALL THE SEARCH RESULTS ARE DATED Dec 31, 1969.