YA Fantasy about a group of teens who gets stuck in the 8th day of the week. Spoilers.

[ALIBUYOG,]

Spoilers Ahead (Based on what i remember)

I think i read this around 2018 - 2019 i think. Like i mentioned the major thing i remember is that there is this group of teens that has a friend i think who is able to go to a parallel world during only the 8th day of the week i think not really sure because it's been a long time and i wasn't able to finish it

[Becca]

The Eighth Day by Diane K. Salerni?

[Genesistrine]

The Eighth Day?

Ed: beaten! Should've refreshed the page...

[Kris]

Amazon's preview of The Eighth Day (also called "The Inquisitor's Mark") by Dianne K. Salerni - Becca and Genesistrine's suggestion:

- https://www.amazon.com/Eighth-Day-Dia...

[Shawna]

Also could be Midnighters by scott Westerfeld except they get stuck in a secret hour at the end of the day only a small amount of people are unfrozen in with monsters.