Do Italians share their celebrations with other countries?

Yes, Italians share the same celebrations as other countries of the Roman Catholic heritage. Indeed, it's the saints' days and the religious holidays that the Italian peninsula celebrates in common with diverse countries of Africa, the Americas, and Europe in particular. So for example, the Christmas and the Easter seasons may be celebrated, in the devout and fun loving Italian way and on a worldwide scale, from the former Italian colony of Tianjin/Tientsin, China; to former Italian settlements in Eritrea, Ethiopia, Libya, and Somalia; to the Italian immigrant communities of the United States of America and of the South American country of Argentina.
Yes, Italians share the same celebrations as other countries of the Roman Catholic heritage. Indeed, it's the saints' days and the religious holidays that the Italian peninsula celebrates in common with diverse countries of Africa, the Americas, and Europe in particular. So for example, the Christmas and the Easter seasons may be celebrated, in the devout and fun loving Italian way and on a worldwide scale, from the former Italian colony of Tianjin/Tientsin, China; to former Italian settlements in Eritrea, Ethiopia, Libya, and Somalia; to the Italian immigrant communities of the United States of America and of the South American country of Argentina.