When the nation prayed John Willans on the National Day of Prayer at the time of Dunkirk John Willans The scene at Westminster Abbey, 26 May, 1940. The National Day of Prayer. May / June sees the 75th anniversary of Dunkirk. subscribe now Join today to gain access to the rest of this article and many others. more info login If you are already a subscriber, log in to continue. log in access code If you have an access code, enter it here: Go free trial Get free access for 14 days: Sign up Click here to find out how we take care of your personal data.