protist

It looks like the template is using <am> and <pm> tags, which is weird. Anyhow, I believe the (non-elegant) quick solution is to open style.css where you’ll find this:

.PostTime pm{
background: #293538 repeat scroll 0 0;
color: #FFF;
padding:0px;
display: block;
width:95px;
left: 0;
font-size: 14px;
text-align: right;
}

Change it to this:

.PostTime pm,
.PostTime am {
background: #293538 repeat scroll 0 0;
color: #FFF;
padding:0px;
display: block;
width:95px;
left: 0;
font-size: 14px;
text-align: right;
}