When was the first battle between willam and Harold?

The first significant battle between William, Duke of Normandy, and Harold Godwinson, King of England, occurred at the Battle of Stamford Bridge on September 25, 1066. However, this battle was not directly between William and Harold, as William had not yet invaded England. The more famous confrontation between them came later at The Battle of Hastings on October 14, 1066, where William ultimately defeated Harold.