'Appointed Time' in the Bible

if his offering is a burnt offering from the herd, he is to bring a male without any defect. He is to present it at the entrance to the Tent of Meeting. At the appointed time, it is to be presented in the presence of the LORD so that he may be accepted.

"Speak to the {Israelites}, and say to them, 'The festivals of Yahweh that you shall proclaim [are] holy assemblies; these [are] my appointed times.

" 'These [are] Yahweh's appointed times, holy assemblies, which you shall proclaim at their appointed time

“These are the Lord’s appointed times that you are to proclaim as sacred assemblies for presenting fire offerings to the Lord, burnt offerings and grain offerings, sacrifices and drink offerings, each on its designated day.

Thus Moses announced to the {Israelites} Yahweh's appointed times.