I am using the jquery datepicker (http://jqueryui.com/demos/datepicker/).
The datepicker on the demo page is small and compact. However, when I use the datepicker on
The demo pages have quite a bit of extra CSS to 'fix' what comes in the packaged CSS that they don't mention anywhere. In my opinion, they do a poor job explaining this, especially with how many time the standard css uses !important.
Also, the ThemeRoller uses em as the default, which is % of a font set elsewhere.
Anyway, the dates are links, so to make them smaller, set a size for a around 9px.
Here's what I do before I use any jquery:
h1 {font-size:10px;}
h2 {font-size:11px;}
h3 {font-size:11px;}
p {font-size:11px;}
a {font-size:11px;}