get zodiac sign

gistfile1.js

function getZodiacSign(date) {
    if(!(date instanceof Date)) date = new Date();

    var dateStr = +[
            date.getMonth() + 1,
            ('0' + date.getDate()).slice(-2)
        ].join('')
        ,signs = [
            [120, 'Capricorn'],
            [219, 'Aquarius'],
            [320, 'Pisces'],
            [420, 'Aries'],
            [521, 'Taurus'],
            [621, 'Gemini'],
            [722, 'Cancer'],
            [822, 'Leo'],
            [923, 'Virgo'],
            [1023,'Libra'],
            [1122, 'Scorpio'],
            [1221, 'Sagittarius'],
            [1231, 'Capricorn']
        ];

    for(var index in signs) {
        var item = signs[index];

        if(dateStr <= item[0]) return item[1];
    }
};