jQuery scripts not working on my Drupal theme
Looks like your classes aren't matching up. I'm guessing that the ideal action you want is when you click on the calendar link, it brings the region-front-calendar up. 

The issue looks like your js isn't doing anything to that region, rather it's attempting to pull up a class called "second" which dosn't exist in the html snippet you posted.

If you switch that to the region-front-calander, that might be the answer your looking for.

(function ($) {
  Drupal.behaviors.yourBehaviorName = {
    attach: function (context, settings) {
        $("#block-menu-menu-mobile ul li .nolink").click(function() {
            $('html,body').animate({
                scrollTop: $(".region-front-calander").offset().top},
                'slow');
        });
    }
  };
})(jQuery);