Otra forma de colocar la fecha.

Si deseas colocar la fecha en tu blog como aparece en el tope de la sidebar de éste blog, sólo tienes que copiar y pegar el código a continuación.

<script language="JavaScript">
<!--
// ==============================================
// Copyright 2003 by jsCode.com
// Source: jsCode.com
// Author: etLux
// Free for all; but please leave in the header.
// ==============================================

// Set the font color, face, size, and style...

// Acceptable TheFontFace values are those you
// normally use in HTML, for instance:
//     Arial
//     TimesRoman
//     Courier

// Acceptable TheFontColor values are any #RRGGBB
// same as HTML. Remember to use the # sign and
// enclose in quotes.  Typical values:
//     #FF0000 is red
//     #00FF00 is green
//     #0000FF is blue

// Acceptable TheFontSize values are 2-7.

// Acceptable TheFontStyle values are (exactly!):
//     plain
//     bold
//     italic
//     bolditalic

var TheFontFace  = "Arial";
var TheFontColor = "#FF0000";
var TheFontSize  = "3";
var TheFontStyle = "bolditalic";

// Set the separator between the date elements;
// usually use either - or /.

var TheSeparator = "-";

// Show or do not show the day of the week; set
// yes to show, no not to show.

var ShowDay ="yes";

// Do Not Edit Below This Line
// ==============================================

var Days = new Array("Domingo","Lunes","Martes","Miercoles","Jueves","Viernes","Sábado");
var TheDate = new Date();

var TheWeekDay = TheDate.getDay();
var Day ="";
if (ShowDay == "yes"){
Day = Days[TheWeekDay];
Day += " ";}

var TheMonthDay = TheDate.getDate();
if (TheMonthDay < 10) TheMonthDay = "0" + TheMonthDay;

var TheMonth = TheDate.getMonth() + 1;
if (TheMonth < 10) TheMonth = "0" + TheMonth;

var TheYear = TheDate.getYear();
if (TheYear < 1000) TheYear += 1900;

var FontTagLeft  = "";
var FontTagRight = "";

if (TheFontStyle == "bold"){
FontTagLeft = "<b>";
FontTagRight ="</b>";}

if (TheFontStyle == "italic"){
FontTagLeft = "<i>";
FontTagRight ="</i>";}

if (TheFontStyle == "bolditalic"){
FontTagLeft = "<b><i>";
FontTagRight = "</i></b>";}

var D = "";
D += "<font color='"+TheFontColor+"' face='"+TheFontFace+"' size='"+TheFontSize+"'>";
D += FontTagLeft+Day+TheMonthDay+TheSeparator+TheMonth+TheSeparator+TheYear+FontTagRight;
D += "</font>";

document.write(D);

//-->
</script>

NOTA: He modificado el código, ya que en el idioma ingles el día aparece en ese idioma, lo referente a la fecha primero colocan el mes, luego la fecha y por último el año. Con el código copiado tal y cual está les aparecerá la fecha de la misma forma que está en el tope de la sidebar.