Happy Moment is the first studio album by South Korean girl group WJSN.

On May 18, 2017, a post to the official WJSN Facebook page announced a new comeback set for June 7 would be "coming soon,"[4] revealing the names of the lead single and the forthcoming album.

[5] On June 7, 2017 at 6PM KST, the music video for "Happy" was released on YouTube and Naver V LIVE[6] and Happy Moment was made available for download on Melon in South Korea and iTunes worldwide.

[7] On June 8, WJSN had their first comeback stage on Mnet's M Countdown performing lead single "Happy" and album track "Miracle".

[8] The album entered at number 9 on the chart for the month of June 2017, with 25,983 physical copies sold.