This melody of Az Yashir Moshe is divided into 3 parts:
- RASD - Dodi Yarad Legano of Parashat Zachor
- PETIHA - zidane
- HIJAZ - same tune of Letzur Goalenu for Pesah
I always sing this "shira" on Shabbat Zachor as well as the first day Yom Tov for Pesah and Sukkot. There are times I sing it on other Shabbatot as well.