Time is not Out There in the World. Time is in us. We create time.

Being and Time
Author	Martin Heidegger

According to Heidegger there is a conception of time as a series of nows which is shared by ordinary people and philosophers from Aristotle to Bergson.

These philosophers and ordinary people will view time with its fundamental terminology of ‘past’ ‘present’ ‘future ‘ as primordial entity from which the human experience of time is derived.

Heidegger views time differently. In simple terms, for Heidegger time is not something which exists in the world and is then reflected in the human mind but something which arises from human beings (Dasein) and is then projected onto to the world. According to this view it is a mistake to think that human beings passively experience the time of the outside world.

For Heidegger , the concept of time in general is actively produced by human modes of being which subsequently temporarises our sense of the world. This is in fact what time  it is the process of temporising

We must hold ourselves aloof from all those significations of past present future. These tensed terms have arisen out of our inauthentic ways of looking at time.