GlobalizeUrls.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Hosting;
using System.IO;
using System.Globalization;

namespace My.Helpers
{
    /// <summary>
    /// Static class that is a store for commonly used filenames 
    /// (so if the files are updated they only need to be amended in a single place)
    /// </summary>
    public static class GlobalizeUrls
    {

        /// <summary>
        /// URL for Globalize: https://github.com/jquery/globalize
        /// </summary>
        public static string Globalize { get { return "~/Scripts/globalize.js"; } }

        /// <summary>
        /// URL for the specific Globalize culture
        /// </summary>
        public static string GlobalizeCulture 
        { 
            get 
            {
                //Determine culture - GUI culture for preference, user selected culture as fallback
                var currentCulture = CultureInfo.CurrentCulture;
                var filePattern = "~/scripts/globalize/globalize.culture.{0}.js";
                var regionalisedFileToUse = string.Format(filePattern, "en-GB"); //Default localisation to use

                //Try to pick a more appropriate regionalisation
                if (File.Exists(HostingEnvironment.MapPath(string.Format(filePattern, currentCulture.Name)))) //First try for a globalize.culture.en-GB.js style file
                    regionalisedFileToUse = string.Format(filePattern, currentCulture.Name);
                else if (File.Exists(HostingEnvironment.MapPath(string.Format(filePattern, currentCulture.TwoLetterISOLanguageName)))) //That failed; now try for a globalize.culture.en.js style file
                    regionalisedFileToUse = string.Format(filePattern, currentCulture.TwoLetterISOLanguageName);

                return regionalisedFileToUse;
            } 
        }
    }
}

jquery.validate.globalize.js

(function ($, Globalize) {

    // Clone original methods we want to call into
    var originalMethods = {
        min: $.validator.methods.min,
        max: $.validator.methods.max,
        range: $.validator.methods.range
    };

    // Tell the validator that we want numbers parsed using Globalize

    $.validator.methods.number = function (value, element) {
        var val = Globalize.parseFloat(value);
        return this.optional(element) || ($.isNumeric(val));
    };

    // Tell the validator that we want dates parsed using Globalize

    $.validator.methods.date = function (value, element) {
        var val = Globalize.parseDate(value);
        return this.optional(element) || (val);
    };

    // Tell the validator that we want numbers parsed using Globalize, 
    // then call into original implementation with parsed value

    $.validator.methods.min = function (value, element, param) {
        var val = Globalize.parseFloat(value);
        return originalMethods.min.call(this, val, element, param);
    };

    $.validator.methods.max = function (value, element, param) {
        var val = Globalize.parseFloat(value);
        return originalMethods.max.call(this, val, element, param);
    };

    $.validator.methods.range = function (value, element, param) {
        var val = Globalize.parseFloat(value);
        return originalMethods.range.call(this, val, element, param);
    };

}(jQuery, Globalize));

$(document).ready(function () {

    // Set Globalize to the current culture driven by the html lang property
    var currentCulture = $("html").prop("lang");
    if (currentCulture) {
        Globalize.culture(currentCulture);
    }
});