def fetch(self):
        '''
        Bit.ly API expect unix timestamps
        '''
        since = time.mktime(self.options.since.datetime.timetuple())
        until = time.mktime(self.options.until.datetime.timetuple())
        log.info("Searching for links saved by {0}".format(self.user))
        self.stats = self.parent.bitly.user_link_history(created_after=since,
                                                         created_before=until)
Bit.ly API expect unix timestamps