Oseibo surprise!

I recently learned about a traditional Japanese custom called Oseibo. I was surprised to find that this was my first time to even hear about the custom. Basically, it is a year end gift, given as a way to say thank you, to the people who have done something nice for you during the past year. The gift can be many things such as, food or beer, but is most often given in the form of money. Cash! The way that I learned was from one of my classes that I teach on Tuesdays. At the very end of class, one of the students told me that the whole class had put together a gift for me and gave me an envelope with Oseibo written on it. He then explained what it was for and why they were giving it to me. I have to say that it was one of the nicest and most generous things that I have ever seen. It really moved me and will leave a lasting impression of Japanese culture on me for the rest of my life.

===Word Help=======
traditional 伝統的な
custom　　　　　　　　　　　習慣、風習
Basically,　　　　　　　　　基本的に（言えば）、
envelope　　　　　　　　　封筒
impression　　　　　　　　　印象
for the rest of my life　　（私の）残りの人生で