Filtering out old results from google search

For searching technical information, often it's the case that results older than a year may as well be in a glass case in a museum. If like me you're sick of scrolling through old results and various mouse clicks to set a suitable filter - append this to your search result:

&tbs=qdr:m

Ideally the "m" for month can be replaced with a year "y" or even "h" for hour.
It would be better if there was a quickly typed search operator for this. But there isn't. There is a date range filter but it requires dates in Julian Calendar format - yuck.