Hide the date from a single post

Here is how I do that in a Twenty Twelve Child Theme:
footer.entry-meta { display: none; } /* hide display of “This entry was posted in…” */

I want do this only for one post, not for all blog’s post…

Any other suggestion?

Problem solved by adding this code:

<span class="meta_date"><?php if (!is_sticky() ) { ?> <?php echo get_the_date(); ?> <?php } ?> </span>

on post.php and post-single.php

When an article is sticky, the date disappears.

Thanks for those who helped me 😉