Air Board
... that the Australian Air Board chose 31 March rather than 1 April as the founding date of the Royal Australian Air Force to avoid being called "April Fools"?
... that the Australian <b id="mwBn8"><a href="./Air_Board_(Australia)" id="mwBoA" rel="mw:WikiLink" title="Air Board (Australia)">Air Board</a></b> <i id="mwBoE">(inaugural members pictured)</i> chose 31 March rather than 1 April as the founding date of the <a href="./Royal_Australian_Air_Force" id="mwBoI" rel="mw:WikiLink" title="Royal Australian Air Force">Royal Australian Air Force</a> to avoid being called "<a href="./April_Fools'_Day" id="mwBoM" rel="mw:WikiLink" title="April Fools' Day">April Fools</a>"?