Halacha:

Chanukah,  Purim 

Machshava:

Chanukah,  Torah She-Ba'al Peh 

References: Megilla: 14a ,  Shabbat: 23a ,  Kiddushin: 30b  

Description

We were all taught at a rather young age that the Torah never changes. But wasn't Purim and Chanukah added later, not to mention biblical laws that are NO LONGER practiced, as well as those that have ...CHANGED?