Board Thread:Lore Discussion/@comment-184.96.122.206-20160313002055/@comment-25356303-20170508152634

I wasn't able to find a specific year that the war ended, but it's likely that the Dragon War happened close to the end of the Merethic Era. Here's what I was able to find: I don't think we'll ever get a specific year for the end of the Dragon War, but my guess is that it was near the end of the Merethic Era. So roughly 4450 years as I said in my above comment.
 * During the quest "Bleak Falls Barrow," Farengar Secret-Fire states, "You see? The terminology is clearly First Era or even earlier. I'm convinced this is a copy of a much older text. Perhaps dating to just after the Dragon War. If so, I could use this to cross-reference the names with other later texts."
 * One of the Etched Tablets at the Throat of the World writes, "With roaring Tongues, the Sky-Children conquer Founding the First Empire with Sword and Voice Whilst the Dragons withdrew from this World." The founding of the Nordic Empire referenced happened early in the First Era, which would indicate that the Dragon War had ended sometime during the late Merethic Era or very, very early First Era.
 * Yet the book The Dragon War states that the war happened specifically during the Merethic Era. If it had ended during the First Era, it's likely that it would have mentioned that. The book There Be Dragons notes that it happened during the Merethic Era as well; it does talk about how the Akaviri killed some dragons. However, note that this happened in the late First Era (thousands of years later), so it's not talking about the Dragon War specifically.