'Appointed Time' in the Bible

Let the sons of Israel also keep the Passover at its appointed time.

In the fourteenth day of this month, between the evenings, you shall keep it in its appointed time. You shall keep it according to all its statutes, and according to all the ceremonies of it.

And those men said to him, We are defiled by the dead body of a man. Why are we kept back that we may not offer an offering of Jehovah in its appointed time among the sons of Israel?

But the man that is clean, and is not in a journey, and holds back from preparing the Passover, even the same soul shall be cut off from among his people. Because he did not bring the offering of Jehovah in His appointed time, that man shall bear his sin.