What is so special about the last day of Chanuka, and why is it considered the end of the teshuva process from the Yamim Noraim?

Is it permitted to use secular dates on documents and in our regular lives? Can a Jew celebrate New Years Day?

What do you do with your leftover oils, wicks and candles? Can you just throw them out?

from the many daily shiurim offered in YU, either on the mesechta that YU is learning that year, or one of the advanced halacha shiurim on various topics in Yoreh Deah