In a celebrated Talmudic dispute, two great Jewish teachers, Hillel and Shammai, argued whether we should begin by lighting eight candles and gradually decrease to one (Shammai), or begin with one candle and add an additional one each night, thus continuously increasing the light and joy of the holiday (Hillel). The majority ruled with Hillel. Thus, on the first night of Hanukkah, we recite or chant the blessings and light one candle with the shamash, two on the second night, and so on. Customarily, the candles are placed in the menorah from right to left but lit from left to right.
Yom HaShoah, also known as Holocaust Remembrance Day, occurs on the 27th of Nisan.
Yom HaAtzmaut, Israeli Independence Day, marking the establishment of the modern state of Israel in 1948, is preceded by Yom HaZikaron, Israeli Memorial Day.