What time is for the nonreligious man of modern society would be more difficult to put into a few words. We do not intend to discuss the modern philosophies of time nor the concepts that modern science uses in its own investigations. Our aim is to compare not systems or philosophies but existential attitudes and behaviors.
This is as much to say that, for him [modern man], time can present neither break nor mystery; for him, time constitutes man's deepest existential dimension; it is linked to his own life, hence it has a beginning and an end, which is death, the annihilation of his life. However many the temporal rythms that he experiences, however great their differences in intensity, nonreligious man knows that they always represent a human experience, in which there is no room for a divine presence.
From 'The Sacred and the Profane' - Mircea Eliade, 1957.