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To celebrate the milestone, DAY6 thanked their fans 'My Day' through a short video clip. In the video, member Wonpil said, "A thousand days could be considered long or short, but I think we have fulfilled our days with worthwhile memories. I hope that this 1000th-day could turn into the 6000th, and eventually even the 10,000th day spent together!" Young K also added, "And, in five days, we will be celebrating the 100th day of our fans 'My Days' as well. What a double celebration!"

Watch the full video for all the messages from DAY6. Congratulations, boys!