Andrew the Apostle commonly referred to as a St Andrew's cross, although its designer, William Porcher Miles, said he changed it from an upright cross to a saltire so that it would not be a religious symbol but merely a heraldic device. The Alabama flag also shows that device. The feast of Andrew is observed on 30 November in both the Eastern and Western churches, and is the national day of Scotland. In the traditional liturgical books of the Catholic Church, the feast of Saint Andrew is the first feast day in the Proper of Saints. Andrew the Apostle Andrew the Apostle (;
Flag of Scotland forming the shape of an X were said to have appeared in the sky. Óengus and his combined force, emboldened by this apparent divine intervention, took to the field and despite being inferior in terms of numbers were victorious. Having interpreted the cloud phenomenon as representing the "crux decussata" upon which Saint Andrew was crucified, Óengus honoured his pre-battle pledge and duly appointed Saint Andrew as the Patron Saint of Scotland. The white saltire set against a celestial blue background is said to have been adopted as the design of the flag of Scotland on the basis of this legend.