tschaub/github-changelog — pull request #4 by tschaub (2014-04-02 22:19:15+00:00)
Title: Add option to filter issues (e.g. merged pull requests only)

It looks to me like the [pull request API](http://developer.github.com/v3/pulls/#list-pull-requests) doesn't allow sorting/filtering by date. One option for listing just merged pull requests would be to use the [issues API](http://developer.github.com/v3/issues/#list-issues-for-a-repository) to get just issues that are pull requests and then check if the pull request [was merged](http://developer.github.com/v3/pulls/#get-if-a-pull-request-has-been-merged). Though this seems excessively chatty.