'Appointed' in the Bible

“The Israelites are to observe the Passover at its appointed time.

You must observe it at its appointed time on the fourteenth day of this month at twilight; you are to observe it according to all its statutes and ordinances.”

and said to him, “We are unclean because of a human corpse. Why should we be excluded from presenting the Lord’s offering at its appointed time with the other Israelites?”

“But the man who is ceremonially clean, is not on a journey, and yet fails to observe the Passover is to be cut off from his people, because he did not present the Lord’s offering at its appointed time. That man will bear the consequences of his sin.

You are to sound the trumpets over your burnt offerings and your fellowship sacrifices and on your joyous occasions, your appointed festivals, and the beginning of each of your months. They will serve as a reminder for you before your God: I am Yahweh your God.”

and you make a fire offering to the Lord from the herd or flock—either a burnt offering or a sacrifice, to fulfill a vow, or as a freewill offering, or at your appointed festivals—to produce a pleasing aroma for the Lord,

“Command the Israelites and say to them: Be sure to present to Me at its appointed time My offering and My food as My fire offering, a pleasing aroma to Me.

“You must offer these to the Lord at your appointed times in addition to your vow and freewill offerings, whether burnt, grain, drink, or fellowship offerings.”