Under the Harrisons, the newspaper, while undergoing little technical change, saw testing times as the island came under German military occupation from 1940 to 1945.

After the island's liberation in 1945, the newspaper grew and in 1957 became the main asset of a newly formed business entity called W E Guiton and Co Ltd.

In August 2015, JEP staff teamed up with the parish of St Saviour to work on their Battle of Flowers float.

In 1911 Philippe Le Sueur Mourant (1848–1918) launched a new series of stories in the Morning News relating the adventures and opinions of Piteur Pain, supposedly a former country blacksmith turned foreman of the printing shop, and his family.

Following the closure of Les Chroniques de Jersey, the Ph'lip et Merrienne articles started appearing in the Evening Post from 2 January 1960.

Written by Edward Le Brocq (1877–1964), who had worked for the Evening Post before becoming editor of the Morning News, they took the form of a letter to the editor supposedly written by an old farming couple from St. Ouen commenting on personalities, events and elections laced with humorous observations on Jersey history and traditions.

Following the death of George d'la Forge, Sir Arthur de la Mare (1914–1994), a retired ambassador, took over the task of contributing regular columns to the newspaper.

Since Sir Arthur's death, a roster of contributors has maintained the tradition of the weekly (or fortnightly) newspaper column.