Syntax – removing author and date from the bottom of the post

Take a look at your CSS and make sure to comment out .entry-meta and to set display to none

.entry-meta { display: none; }
/*
.entry-meta, .entry-meta a {
  color: #999999;
  font-size: 0.77778em;
  line-height: 2.12143em;
}
.entry-meta a {
  font-size: inherit;
}*/