I was asked to iterate through each day from today to the first of this year and only print out date information for each Wednesday. I used pure JavaScript to do this.

getWednesdaysOfThisYear.js

var now = new Date();

for (var d = now; d >= new Date(new Date().getFullYear(), 0, 1); d.setDate(d.getDate() - 1)) {
    if (d.getDay() == 3) {
        console.log(new Date(d));
    }
}