Yom HaShoah, literally ‘Holocaust Day’ is a day of remembrance for victims of the Holocaust or Shoah. Its full name is Yom Hazikaron LaShoah v’LiGevurah, literally ‘Holocaust and Heroism Remembrance Day’, יום הזכרון לשואה ולגבורה.
The date of the 27th day of the Hebrew month of Nisan was chosen because it commemorates the Warsaw Ghetto uprising, the best known of the armed Jewish uprisings.