KFC issued an apology after encouraging German consumers to commemorate Kristallnacht with cheesy chicken in a promotional message.
More than 90 individuals were killed in the coordinated attacks carried out by the Nazis in 1938, which also damaged Jewish - owned businesses and places of worship. Many people believe that it marked the start of the Holocaust.
The message, which received harsh criticism for its lack of tact, was ultimately attributed to "an error in our system".
On Wednesday, the fast food chain issued an app notice stating: "It's memorial day for Kristallnacht! Treat yourself with more tender cheese on your crispy chicken. Now at KFCheese!"
According to the newspaper, a second message with an apology was issued around an hour later. "We are very sorry, we will check our internal processes immediately so that this does not happen again. Please excuse this error," According to reports, the message said.
The 9 November Kristallnacht anniversary is taken seriously in Germany, where a number of memorial activities and talks are planned to remember the more than six million Jews who were murdered by the Nazis.
The Board of Deputies of British Jews' Director of Public Affairs, Daniel Sugarman, called the initial KFC message "absolutely hideous".
Jewish NGO Anti-Defamation League's associate director of European relations, Dalia Grinfeld, tweeted: "How wrong can you get on Kristallnacht KFC Germany. Shame on you!"