bizopen.js

var areWeOpen = function() {
    var bizHours = [
        ["0900", "1800"],
        ["0630", "2000"],
        ["0630", "2000"],
        ["0630", "2000"],
        ["0630", "2000"],
        ["0630", "2000"],
        ["0800", "2000"]
    ];

    var today = moment().format("e");
    var tomorrow = moment().add(1, 'days').format("e");
    var open = moment(bizHours[today][0], "HHmm").format("HHmm");
    var close = moment(bizHours[today][1], "HHmm").format("HHmm");
    var now = moment(now).format("HHmm");

    var openStatus = function () {
        var status = "Closed";
        if (open <= now && now < close) {
            status = "We are Open now... Why aren't you here?";
        } else {
            status = "We are closed and will re-open tomorrow morning at " + 
                moment(bizHours[tomorrow][0], "HHmm").format("HH[:]mm a");
        }
        return status;
    };
    return openStatus();
}
alert(areWeOpen());

Requires the moment.js plugin. Use as you see fit.
Please let me know what changes you might make or suggest :)
I created this to be able to display the status of the business for the day on their website.