CSS and the Calendar

Not sure if this has been covered. I did a search but came up empty so I am sorry if I missed it.

I added the a:link to my css file but used a font-weight of normal for the links on my blog. I would like the dates on the calendar that have links to be bold so I need to add another a:link that controls the calendar. Anyone know how to do this? I thought it would simply be the below thing but I was wrong.

.calendar a:link {
color: #000000;
font-weight: bold;
text-decoration: none;
}