style.css, Beispiel Calendar:

#wp-calendar a:link {
#background-color: #FFCC66;
background-color: yellow;
color: blue;
}

#wp-calendar td a:visited {
#background-color: #FFCC66;
#background-color: #CFF;
#color: green;
}

#wp-calendar td a:hover {
background-color: #0000CC;
color: red;
}

#wp-calendar td a:active {
background-color: #CCCCFF;
color: magenta;
}
Referenz

style.css, Links im Beitragstext fett :

.entry a {
font-weight: bold;
}