Do you understand Pentecost ?
In Hebrew “ Festival of Shaḇu’ot” In Greek “Pentecost” In English “ Feast of Weeks "
 Surprise , this is Torah, the Instructions of our Heavenly Father. 
 ● Etymology . The term Pentecost comes from the Greek Πεντηκοστή (Pentēkostē) meaning " fiftieth ". It refers to the festival celebrated on the fiftieth day after Feast of FIRSTFRUITS , also known as the " Feast of Weeks " 
 Wayyiqra (Leviticus) 23:15 TS2009 

‘And from the morrow after the Sabbath , from the day that you brought the sheaf of the wave offering , you shall count for yourselves: seven completed Sabbaths. 

 Wayyiqra (Leviticus) 23:16 TS2009 

‘Until the morrow after the seventh Sabbath you count fifty days, then you shall bring a new grain offering to Yah (יהוה).

 Shemoth (Exodus) 34:22 TS2009 

And perform the Festival of Shaḇu’ot for yourself, of the first-fruits of wheat harvest, and the Festival of Ingathering at the turn of the year.

 Bemiḏbar (Numbers) 28:26 TS2009 

And on the day of the first-fruits, when you bring a new grain offering to Yah (יהוה) at your Festival of Shaḇu’ot, you have a set-apart gathering, you do no servile work. 

 Deḇarim (Deuteronomy) 16:10 TS2009 

And you shall perform the Festival of Shaḇu’ot to Yah (יהוה) your Elohim , according to the voluntary offering from your hand, which you give as Yah (יהוה) your Elohim blesses you 
● Now we have the followers of Messiah after His death and ressurection keeping the Instructions of Yah through and because of Yahshua Ha'Mashiach. 
 Ma`asei (Acts) 2:1-4 (TS2009) 
And when the Day of the Festival of Shaḇu‛ot had come, they were all with one mind in one place. And suddenly there came a sound from the heaven, as of a rushing mighty wind, and it filled all the house where they were sitting. And there appeared to them divided tongues, as of fire, and settled on each one of them. And they were all filled with the Set-apart Spirit and began to speak with other tongues, as the Spirit gave them to speak. 
 MA'ASIYM - The Acts of the Apostles 
 2:1-4 (א ת Cepher) 
AND when the day of Shavu'oth 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 houses where they were sitting. 3 And there appeared unto them cloven tongue like as of fire, and it sat upon each of them. 4 And they were filled with the RUACH HA'QODESH and began to speak with other tongues, as the RUACH gave them utterance 
 Acts 2:1-4 (TLV) 
When the day of Shavuot had come, they were all together in one place. Suddenly there came from heaven a sound like a mighty rushing wind, and it filled the whole house where they were sitting. And tongues like fire spreading out appeared to them and settled on each one of them. They were all filled with the Ruach ha-Kodesh and began to speak in other tongues as the Ruach enabled them to speak out. 
 Acts 2:1-4 (NKJV) 
When the Day of Pentecost had fully come, they were all with one accord in one place. And suddenly there came a sound from heaven, as of a rushing mighty wind, and it filled the whole house where they were sitting. Then there appeared to them divided tongues, as of fire, and one sat upon each of them. And they were all filled with the Holy Spirit and began to speak with other tongues, as the Spirit gave them utterance. 
● Wait there is more, if the Instructions of our Heavenly Father were NAILED to the cross, than FOLLOWERS OF MESSIAH WOULD NOT CONTINUE TO KEEP TORAH.
Remember the commandment from Yah says TO COUNT THE SABBATHS TO:
In Hebrew “ Festival of Shaḇu’ot” In Greek “Pentecost” In English “ Feast of Weeks " 
Here we see THE COUNT OF THE FIRST SABBATH : 
 MA' ASIYM (THE ACTS OF THE APOSTLES) 
 Acts 20:7 ( א ת Eth- CEPHER) 
AND UPON THE FIRST SHABBATH, WHEN THE TALMIDIYM CAME TOGETHER TO BREAK BREAD, PA' AL PREACHED UNTO THEM, READY TO DEPART ON THE MORROW; AND CONTINUED HIS SPEECH UNTIL MIDNIGHT 
 ● LET US EXAMINE THE GREEK 
 [first day] 
 1520. heis ► 
 Strong's Concordance 
 heis: one 
Original Word: εἷς, μία, ἕν
Part of Speech: Adjective
Transliteration: heis
Phonetic Spelling: (hice)
 Definition: one 
 Usage: one. 

 [of the week] 
 4521. sabbaton ► 
 Strong's Concordance 
sabbaton: the Sabbath, i.e. the seventh day (of the week) 
Original Word: σάββατον, ου, τό
Part of Speech: Noun, Neuter
Transliteration: sabbaton
Phonetic Spelling: (sab'-bat-on)
 Definition: the Sabbath, the seventh day (of the week) 
 Usage: the Sabbath, a week. 
 Acts 20:7 (NKJV) 
Now on the first day of the week, when the disciples came together to break bread, Paul, ready to depart the next day, spoke to them and continued his message until midnight. 
● This is THE CONFORMATION THE SABBATH WERE BEING COUNTED: 
 Ma`asei (Acts) 20:16 TS2009 

For Sha’ul had decided to sail past Ephesos, so that he might lose no time in Asia, for he was hurrying to be at Yerushalayim, if possible, on the Day of the Festival of Shaḇu’ot. 
 Acts 20:16 (NKJV) 
For Paul had decided to sail past Ephesus, so that he would not have to spend time in Asia; for he was hurrying to be at Jerusalem, if possible, on the Day of Pentecost. 
● Why in Jerusalem, Once again the followers of Yahshua Ha'Mashiach are keeping Torah the Instructions of Yah after the death and RESSURECTION OF HIS SON 
 Shemoth (Exodus) 23:14-17 TS2009 
“ Three times in the year you are to celebrate a festival to Me: Guard the Festival of Matzot. Seven days you eat unleavened bread, as I commanded you, at the time appointed in the new moon of Aḇiḇ – for in it you came out of Mitsrayim – and do not appear before Me empty-handed; and the Festival of the Harvest, the first-fruits of your labours which you have sown in the field; and the Festival of the Ingathering at the outgoing of the year, when you have gathered in the fruit of your labours from the field. “Three times in the year all your males are to appear before the Master Yah (יהוה).