Is_it_Programmers_Day.js

var now         = new Date(),
    year        = now.getYear() + 1900,
    first       = new Date(year, 0, 0),
    elapsedMs   = now.getTime() - first.getTime(),
    elapsedDays = ~~(elapsedMs / (1000 * 60 * 60 * 24))

if (elapsedDays === Math.pow(2, 8)) {
    console.log("Yes. Happy Programmers' Day!")
} else {
    console.log("No. Get back to work.")
}