clicktime.user.js

// ==UserScript==
// @name         Clicktime Script
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  Sets timecard to previous week, if Wednesday or before.
// @author       Garrett Green
// @match        https://app.clicktime.com/App/WeekEntry/
// @grant        none
// @require http://code.jquery.com/jquery-latest.js
// @require https://cdnjs.cloudflare.com/ajax/libs/js-url/2.3.0/url.js
// @require https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.13.0/moment.min.js

//==/UserScript==
/* jshint -W097 */
'use strict';

// Your code here...

(function () {
    var today = moment();
    //If Wednesday or before, go to previous week.
    if (today.day() <= 3) {
        //Goto previous Saturday
        var m = today.day(-1);
        //Get Current URL
        var u = url();
        //If it doesn'y end with a question mark add it.
        if (!u.endsWith('?')) {
            u += '?';
        }
        //Add date parameter to url.
        u += 'dt=' + m.format('YYYYMMDD');
        //Redirect to that url.
        window.location.href = u;
    }
})();