Can we have some date-related advanced super ninja search options please?  Something along the lines of

    maxage:30               find posts less than 30 days old
    from:yyyy-mm-dd         find posts no older than yyyy-mm-dd
    to:yyyy-mm-dd           find posts no newer than yyyy-mm-dd

or, more explicitly (as [suggested by Jon Seigel](https://meta.stackexchange.com/questions/55037/add-date-range-to-advanced-super-ninja-search-options/58502#58502)):

    postedbefore:<timestamp>
    postedafter:<timestamp>
    modifiedbefore:<timestamp>
    modifiedafter:<timestamp>

The other day I was trying to find a question to refer to but I couldn't find it in the sea of "relevant" search results.  Maybe date ranges would speed up some queries too?