The contemporary debate on time which was opened up by J. E. M McTaggart tends to focus on metaphysical issues framed in the dispute between tensed theories and tenseless theories. In the history of the philosophy of time, on the other hand, the subject matter looks strikingly different, and the focus is more wideranging. At least three main categories should be considered: idealism, realism, and relationism. This paper aims to offer an insight into contemporary and classical philosophy of time from a systematic perspective and thereby to suggest a research program worth exploring.