History is certainly about changes that occur over time. It is about finding out how things were in the past and how things have changed. As soon as we compare the past with the present we refer to time, we talk of “before” and “after”. But time does not have to be always precisely dated in terms of a particular year or a month. Sometimes it is actually incorrect to fix precise dates to processes that happen over a period of time. Similarly, we cannot fix one single date on which British rule was established, or the national movement started, or changes took place within the economy and society. All these things happened over a stretch of time. We can only refer to a span of time, an approximate period over which particular changes became visible.
