1 confirmed releases and premieres in June 2021: 1 artists, 0 music videos. Sources are official YouTube channel teasers/MVs/audio, Apple Music release dates and the Wikipedia release list, marked on every line. Rumoured or unconfirmed dates are not listed. Dates in KST.
By source: Apple Music 1; by type: Song 1. The busiest day was 2021-06-19 (1), and the most frequent artists were 양홍원 (1). YouTube entries come from the daily 05:35 KST RSS sweep of 36 official channels, so only premieres after tracking began appear; Apple Music dates cover songs that reached the Apple top 100; the Wikipedia list is album-level and may not link to a song page.