define(["datetime"],function(datetime){"use strict";function humane_date(date_str){var format,time_formats=[[90,"a minute"],[3600,"minutes",60],[5400,"an hour"],[86400,"hours",3600],[129600,"a day"],[604800,"days",86400],[907200,"a week"],[2628e3,"weeks",604800],[3942e3,"a month"],[31536e3,"months",2628e3],[47304e3,"a year"],[31536e5,"years",31536e3]],dt=new Date,date=datetime.parseISO8601Date(date_str,!0),seconds=(dt-date)/1e3,i=0;for(seconds<0&&(seconds=Math.abs(seconds));format=time_formats[i++];)if(seconds<format[0])return 2==format.length?format[1]+" ago":Math.round(seconds/format[2])+" "+format[1]+" ago";return seconds>47304e5?Math.round(seconds/47304e5)+" centuries ago":date_str}return window.humane_date=humane_date,humane_date});