On the Hebrew calendar, a leap year means adding a second month of Adar. Purim is celebrated in the second month, and Purim Katan – the “Small Purim,” is marked during the first month of Adar.
On this day, the 14th of Adar l in 5746 – 1986, the Rebbe spoke about how to spend the next thirty days leading up to Purim. 14 Adar I, 5746 – February 23, 1986