To everyone complaining about the event ending, do you even read the notices?

"Event Time: 2019/12/19 5:00(GMT-5)~2020/1/1 23:59(GMT-5)...
Event Shop: Items will refresh at 4:00(GMT-5), the shop will remain open for a week after the event ends."

Sounds like you only have yourself to blame for not reading the information that was provided.