You can specify how old is too old for content to appear in the widget.
Add a parameter of “pubdate” to the widget installation code whose value is the published date of the content on that page (format: yyyy-mm-dd hh:mm:ss). WordPress users: If you are using the plugin, this is already done for you.
Email firstname.lastname@example.org and specify how recent content should be (in days) to appear in the widget.
Your changes may take a short time to take effect.