[ask] cara menyembunyikan tanggal postingan?

Setuju dengan jawaban Mas Lutvi. Cari saja the_date() atau the_time(). Tapi WordPress tidak merekomendasikan hal tersebut (in case for theme design development) 🙂
Respect date and time format settings unless it's important to the design. ~ Theme Development on WordPress Codex (http://codex.wordpress.org/Theme_Development)