Если кому интересно:
http://www.google.com/apis/reference.html#2_7
If you want to limit your results to documents that were published within a specific date range, then you can use the "daterange:" query term to accomplish this. The "daterange:" query term must be in the following format:
daterange:<start_date>-<end date>
where
<start_date> = Julian date indicating the start of the date range
<end date> = Julian date indicating the end of the date range
The Julian date is calculated by the number of days since January 1, 4713 BC. For example, the Julian date for August 1, 2001 is 2452122.
