The letter ‘J’ as we know it today was not ‘invented’ in a specific year. Instead, it evolved over time. The letter ‘J’ originated from the letter ‘I’ in the Latin alphabet. During the Middle Ages, scribes began to use a longer tail on the letter ‘I’ when it appeared at the end of a word or before another vowel. This longer tail eventually became distinct enough to be considered a separate letter.
By the 16th century, the letter ‘J’ was fully recognized as a distinct letter in the English alphabet. This development was influenced by the work of scholars and printers who standardized the use of letters. So, while there isn’t a specific year when the letter ‘J’ was invented, it became a distinct letter in the English alphabet by the 1500s.