Are you looking for a script for showing the hour in your blog, just for reminding your readers that there's a real world waiting for them ? Here is one script which doesn't need to load an external thing.
<div id='clock'>
<script type='text/javascript'>var d = new Date(); document.write(d.getHours()+':'+d.getMinutes());</script>
</div>
Just put the script above in an html/javascript widget and you'll have the exact hour showed in your blog.
Cool ?