Halloween is not satanic and anyone who says so isn't looking into the history. The catholic tradition of All Hallow's Eve started in the 8th century AD when people would attend a special Holy Mass dedicated to dead saints and martyrs, as the day of November 1st is the day of All Saints' Solemnity. They would then dress up as their favorite saints and then trade soul cakes with the poor in exchange for prayers to the dead in purgatory. The use of skulls and other deathly items were a form of memento mori - a reminder of one's own mortality, which is especially common in the Mexican Día de los muertos. A lot of catholic monks to this day keep a memento mori even outside of holidays like these as a reminder that they only have a limited time on Earth to repent before they get judged for eternal life. Though, in modernity most people dedicate it to sinful things such as women dressing up as whores or getting drunk at halloween parties, feeding kids razors, etc. but this tradition should not be lost to time