All saints day is the name of the day after Halloween. It actually used to be on may 13 untill one of the popes changed it. Halloween is celebrated internationally but some believe it began years ago with the celts. They used to celebrate on oct 31 but not for halloween. They celebrated the end of the harvest season. The thing is they believed that day was a day that the dead were kind of alive. They thought the dead could cause trouble like damage the crops and things like that.
They had big bonfires and slaughtered livestock. They wore scary masks to scare the dead as if that would really work. These were the old pagans and they were a strange bunch for sure. So next time some one asks you what’s the name of the day after halloween you can tell em All Saints Day.