For the Christian world, January 1st is New Years' Day but for many religious communities it is not a particularly auspicious day because religious calendars differ and, consequently, different religions celebrate the beginning of their New Year on different dates. The difference in religious calendars is just one way in which religions disagree about the nature of time. Some, notably Christianity, Judaism and Islam think it is linear; that time began at the moment of creation and is leading us to the End. However, Hindus, Buddhists and Sikhs believe that time is cyclical; that it goes round in an unceasing circle of birth, death and re-incarnation. Does it matter? And does what we believe about time affect the way we live our lives? Joining Ernie Rea to discuss differing concepts of Time in religious traditions are Eleanor Nesbitt, Professor Emeritus in the Religions and Education Research Unit at the University of Warwick; Shayk Soheeb Saeed, an Academic and Quran scholar at the University of Edinburgh where he is also the Muslim Chaplain; and Dr Andrew Crome, Lecturer in Early Modern History at Manchester Metropolitan University. Ernie also talks to Richard D Lewis - the author of 'When Cultures Collide' - who talks about the novel approach to time keeping held by the people of Madagascar. Producer: Helen Lee.