Ever thought why going to office on Monday after a long holiday becomes a daunting task especially in this bone-chilling cold? Blame it on seasonal affective disorder (SAD). The first working day after the holidays can be a depressing time for people coping with a post-holiday letdown and a type of depression triggered by short days called SAD revealed a new study. 'In New Year first Monday would be especially blue owing to the added stress of the bone-chilling weather' said psychiatrist Angelos Halaris of Loyola University Medical Centre in Chicago US. 'For people affected by SAD energy and mood