A system for normalizing aggregated electronic data may include at least one processor and a memory. The processor may access data scraped from a plurality of local databases, each storing localized terms for temporal local milestones; for example, a first localized term for a first temporal milestone in a first locale may differ from a second localized term for a similar second temporal milestone in a second locale. The processor may store the temporal local milestones in a central database, determine a mapping of each of the localized terms for each temporal local milestone to a normalized term for each milestone, and identify, in a displayed timeline associated with the first locale, each associated temporal local milestone using the normalized term for each milestone. The processor may further identify, in a displayed timeline associated with the second locale, each associated temporal local milestone using the normalized term for each milestone.