週刊ヤングサンデー
The magazine's title, "Monthly Sunday Gene-X", refers to its mission as a manga magazine for Generation X. The first issue was published on July 19, 2000 and new issues are published on the 19th day of each month — not necessarily on a Sunday. The title uses the word "Sunday" more as a trademark or genre name, shared with its sister magazines "Weekly Shōnen Sunday" and "Weekly Young Sunday".