When did Dust 2 come out?

Excuse me, could you perhaps clarify for me when exactly the game mode known as Dust 2 was initially released? I'm quite interested in knowing the historical context behind this particular iteration of the popular multiplayer map, and I'm hoping you might be able to provide me with some insight. Is there a specific year or month that Dust 2 made its debut? I'd greatly appreciate any information you might have on this topic.