Fully customizable today, yesterday and date filter in angularjs.

today-yesterday.filter.js

.filter("timeago", function ($filter) {
    //time: the time
    //local: compared to what time? default: now
    return function (time, local) {
        if (!time) 
            return "never";
        if (!local)
            (local = Date.now())
        if (angular.isDate(time))
            time = time.getTime();
        else if (typeof time === "string")
            time = new Date(time).getTime();
        
        if (angular.isDate(local))
            local = local.getTime();
        else if (typeof local === "string")
            local = new Date(local).getTime();

        if (typeof time !== 'number' || typeof local !== 'number') 
            return;

        var today = new Date().setHours(0,0,0,0);
        var yesterday = new Date(Date.now() - 86400000).setHours(0,0,0,0);

        var offset = Math.abs((local - time) / 1000),
            span = [],
            HOUR = 3600;

        if (offset < ((HOUR * 24) - 1) && time > today)                 span = [ 'today at', $filter('date')(time, 'HH:mm')];
        else if (offset < (HOUR * 24 * 2) - 1 && time > yesterday)      span = [ 'yesterday at', $filter('date')(time, 'HH:mm')];
        else                                                            span = [ '', $filter('date')(time, 'MMM dd HH:mm')]

        span = span.join(' ');
        return span;
    }
})