3334 - Melaveh Malkah in honor of Chazak, for many years of dedicated work for Chabad.

The salvation of the Jewish people lies in saving the Jewish children, who are the future of our people, both physically and spiritually. The date of this letter is the 9th of Adar, which coincides with the previous Rebbe's arrival in the USA. https://www.torahrecordings.com/rebbe/igroskodesh/010/006/3334