The last five days of Kartika month are known as Bhisma-Panacaka. Grandfather Bhisma fasted for these five days, preparing to give up his life. However one observes Kartika-vrata, he should intensify it for the last five days. The best way to observe the Kartika-vrata is to abstain from eating grains for the whole month, and to take only milk or water for the last five days. If one eats grains during the month, he should avoid them for the last five days. Also, one should only eat once a day.