Fifty days to the day after the seventh Sabbath (7 weeks and 1 day after Passover) is Shavuot or the Feast of Weeks. It celebrates the harvest of which Yah has blessed the land. It also celebrates when the believers in Messiah were bestowed with the Ruach Ha’kodesh.

All Feast Days begin at sundown and end at sundown on the day specified in your location.

Leviticus 23:15-22

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 Yah.

17 Ye shall bring out of your habitations two wave loaves of two tenth deals; they shall be of fine flour; they shall be baken with leaven; they are the firstfruits unto Yah.

18 And ye shall offer with the bread seven lambs without blemish of the first year, and one young bullock, and two rams: they shall be for a burnt offering unto Yah, with their meat offering, and their drink offerings, even an offering made by fire, of sweet savour unto Yah.

19 Then ye shall sacrifice one kid of the goats for a sin offering, and two lambs of the first year for a sacrifice of peace offerings.

20 And the priest shall wave them with the bread of the firstfruits for a wave offering before Yah, with the two lambs: they shall be holy to Yah for the priest.

21 And ye shall proclaim on the selfsame day, that it may be an holy convocation unto you: ye shall do no servile work therein: it shall be a statute forever in all your dwellings throughout your generations.

22 And when ye reap the harvest of your land, thou shalt not make clean riddance of the corners of thy field when thou reapest, neither shalt thou gather any gleaning of thy harvest: thou shalt leave them unto the poor, and to the stranger: I am Yah your God.

Acts 2:1-21

And when the day of Pentecost was fully come, they were all with one accord in one place.

2 And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting.

3 And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.

4 And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.

5 And there were dwelling at Jerusalem Jews, devout men, out of every nation under heaven.

6 Now when this was noised abroad, the multitude came together, and were confounded, because that every man heard them speak in his own language.

7 And they were all amazed and marvelled, saying one to another, Behold, are not all these which speak Galilaeans?

8 And how hear we every man in our own tongue, wherein we were born?

9 Parthians, and Medes, and Elamites, and the dwellers in Mesopotamia, and in Judaea, and Cappadocia, in Pontus, and Asia,

10 Phrygia, and Pamphylia, in Egypt, and in the parts of Libya about Cyrene, and strangers of Rome, Jews and proselytes,

11 Cretes and Arabians, we do hear them speak in our tongues the wonderful works of God.

12 And they were all amazed, and were in doubt, saying one to another, What meaneth this?

13 Others mocking said, These men are full of new wine.

14 But Peter, standing up with the eleven, lifted up his voice, and said unto them, Ye men of Judaea, and all ye that dwell at Jerusalem, be this known unto you, and hearken to my words:

15 For these are not drunken, as ye suppose, seeing it is but the third hour of the day.

16 But this is that which was spoken by the prophet Joel;

17 And it shall come to pass in the last days, saith Yah, I will pour out of my Spirit upon all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams:

18 And on my servants and on my handmaidens I will pour out in those days of my Spirit; and they shall prophesy:

19 And I will shew wonders in heaven above, and signs in the earth beneath; blood, and fire, and vapour of smoke:

20 The sun shall be turned into darkness, and the moon into blood, before the great and notable day of Yah come:

21 And it shall come to pass, that whosoever shall call on the name of Yah shall be saved.