Why is day of the dead not celebrated in all countries?

Day of the Dead, primarily celebrated in Mexico, has deep cultural and historical roots tied to indigenous traditions and Catholic influences unique to the region. Other countries may have different customs and traditions for honoring the deceased, which reflect their own cultural identities and beliefs. Additionally, the celebration's specific practices and meanings may not resonate with societies that do not share the same historical context or demographic makeup. Consequently, while the essence of remembering loved ones is universal, the specific celebration of Day of the Dead remains localized.