DayName = new Array(7)
DayName[0] = "Niedziela "
DayName[1] = "Poniedziałek "
DayName[2] = "Wtorek "
DayName[3] = "środa "
DayName[4] = "Czwartek "
DayName[5] = "Piątek "
DayName[6] = "Sobota "

MonthName = new Array(12)
MonthName[0] = "stycznia "
MonthName[1] = "lutego "
MonthName[2] = "marca "
MonthName[3] = "kwietnia "
MonthName[4] = "maja "
MonthName[5] = "czerwca "
MonthName[6] = "lipca "
MonthName[7] = "sierpnia "
MonthName[8] = "września "
MonthName[9] = "października "
MonthName[10] = "listopada "
MonthName[11] = "grudnia "

function getDateStr(){
    var Today = new Date()
    var WeekDay = Today.getDay()
    var Month = Today.getMonth()
    var Day = Today.getDate()
    var Year = Today.getFullYear()

    if(Year <= 99)
        Year += 1900

    return DayName[WeekDay] + "," + " " + Day + " " + MonthName[Month] + ", " + Year
}
document.write(getDateStr())