The official flowersmeraldo Instagram account has posted a video on May 20th KST which is the day Taehyung snaps and kills his abusive father to protect his sister, triggering the time-looping events of the HYYH in the Bangtan Universe. I think it's supposed to represent the fireworks the boys used to watch together during their gateway to the sea in the HYYH storyline.

I wonder what this means and if it means something at all. Nonetheless, I admire BigHit"s dedication to keeping this story alive.