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When was John XXIII elected pope?

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John XXIII
St. John XXIII Pope John XXIII said the goal of his papacy was to “bring the church up to date” and regenerate Catholic faith.

St. John XXIII was elected pope in October 1958, following the death of his predecessor, Pius XII.12

It is important to distinguish him from the 15th-century figure also known as John XXIII, who was a schismatic antipope elected in 1410.3