God established ALL of the dates for His feast days in Lev.23. There was no need to keep repeating the dates in the OT nor the NT.
God's Sabbath is always in the 7th day.
God's Feast of Passover is always in the 14th day of His first month.
God's Feast of Unleavened Bread is always on the 15th day of His first month.
And so on for the rest of God's High Days.
God tells us these Feast's are to be kept FOREVER at the appointed time!
In the book of Zech. we find that ALL nations will keep the feast of Tabernacles when Jesus returns. There is no need to repeat the date because we have the 23rd chapter of Lev. to refer to if needed. And Lev. tells us that the Feast of Tabernacles is commanded to be kept on the 15th day of God's seventh month for (7) days;
Lev.23
[34] Speak unto the children of Israel, saying, The fifteenth day of this seventh month shall be the feast of tabernacles for seven days unto the LORD.
And so it is with ALL of God feast days.
No dates needed to be given in the NT for God's Passover, for it had been kept on the 14th day of the first of God's month's for centuries.
OT material...again who keeps them today?
I find the verse you quoted interesting;
Matt.24
[35] Heaven and earth shall pass away, but my words shall not pass away.
Matt.24
[35] Heaven and earth shall pass away, but my words shall not pass away.
So even when the heavens and earth, as we know them, are no longer the following will remain forever;
Exod.12
[14] And this day shall be unto you for a memorial; and ye shall keep it a feast to the LORD throughout your generations; ye shall keep it a feast by an ordinance for ever.
[17] And ye shall observe the feast of unleavened bread; for in this selfsame day have I brought your armies out of the land of Egypt: therefore shall ye observe this day in your generations by an ordinance for ever.
Lev.23
[2] Speak unto the children of Israel, and say unto them, Concerning the feasts of the LORD, which ye shall proclaim to be holy convocations, even these are my feasts.
[3] Six days shall work be done: but the seventh day is the sabbath of rest, an holy convocation; ye shall do no work therein: it is the sabbath of the LORD in all your dwellings.
[4] These are the feasts of the LORD, even holy convocations, which ye shall proclaim in their seasons.
[5] In the fourteenth day of the first month at even is the LORD's passover.
[6] And on the fifteenth day of the same month is the feast of unleavened bread unto the LORD: seven days ye must eat unleavened bread.
[15] And ye shall count unto you from the morrow after the sabbath, from the day that ye brought the sheaf of the wave offering; seven sabbaths shall be complete:
[16] Even unto the morrow after the seventh sabbath shall ye number fifty days; and ye shall offer a new meat offering unto the LORD.
[24] Speak unto the children of Israel, saying, In the seventh month, in the first day of the month, shall ye have a sabbath, a memorial of blowing of trumpets, an holy convocation.
[27] Also on the tenth day of this seventh month there shall be a day of atonement: it shall be an holy convocation unto you; and ye shall afflict your souls, and offer an offering made by fire unto the LORD.
[34] Speak unto the children of Israel, saying, The fifteenth day of this seventh month shall be the feast of tabernacles for seven days unto the LORD.
[36] Seven days ye shall offer an offering made by fire unto the LORD: on the eighth day shall be an holy convocation unto you; and ye shall offer an offering made by fire unto the LORD: it is a solemn assembly; and ye shall do no servile work therein.
So even after the heavens and the earth are no more God's words above will remain;
His 7th day Sabbath will remain! Lev.23:2-3
His Feast of Passover will remain! Lev.23:5
His Feast of Unleavened Bread will remain! Lev.23:6
His Day of Pentecost will remain! Lev.23:15-16
His Memorial of the Blowing of the Trumpets will remain! Lev.23:24
His Day of Atonement will remain! Lev.23:27
His Feast of Tabernacles will remain! Lev.23:34
And His Great 8th day will remain! Lev.23:36
God said His words would not pass away and that His Feasts were to be kept forever at the appointed time....that means on the dates that He commanded.
Now do you think God was fibbing when He said this!
Specific dates and times are not important today...that is why you keep posting OT material.
The Son fulfilled the OT Law for us....thus, of what importance are they now...?