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History ❯ Modern History ❯ 20th Century

World War I

Daylight Saving Time Daylight Saving Time Introduction Adolf Hitler Daylight Saving Time Implementation Charles de Gaulle Energy Conservation Ottoman Empire Time Changes British Summer Time Time Change Legislation US-Denmark Relations Time Change Practices Changes in Timekeeping Legislation on Time Changes Daylight Saving Time Policy Daylight Saving Time Origins Legislation Salvation Army