Missing dates (+arrival ?) posted on from IG

I think these dates may have a meaning that I don't see so I share them maybe someone will find something

08.03.2018 : Donna Raines

11.15.2019 : Boyd Stevens , Abby , Eilis

02,28,2021 : Fatima Hassan 03,18,2021 : kenny Liu , Bing-qian , Tian-chen 08,06,2021 : Kristi Miller 09,18,2021 : Sara Myers , Nathan Myers

02.20.2022 : Jim Matthews ,Tabitha , Julie , Ethan // Jade , Tobey

I don't know if it's a coincidence but the number eight is a bit too present, no? ♾️