.... When the Holy Spirit came, Luke stretches language to its limit to try to capture what occurred:
a sound came from heaven like the rush of a mighty wind; tongues as of fire.
This was not anticipated and therefore those present were filled with wonder and astonishment......
They would have stayed up all night studying the Holy Word of G-d i.e.the Torah. They were required to be in Jerusalem to celebrate Shavuot, Shavuot is seven weeks and one day hence fifty days The L-rd's Feast of First Fruits is the day following the shabbat Shavuot is the end of the counting of the Omer( First Fruits) Shavuot also celebrates the giving of the Torah to Moses by YHvH The Book of Ruth is read by all during this feast. Ruth (gentile bride) and Boaz (Kinsman-Redeemer) are ancestors of Y'shua. I was not a surprise for the followers of the haMashiach known as Y'shua.
b'shem Y'shua
which is a mandatory feast of the L-rd to be celebrated Jerusalem.
following the L-rd's Feast of First Fruits.
following Passover, hence the first day of the week(Sunday).
at Mount Sinai and they became a people consecrated to YHvH.
The story of Ruth is about a gentile woman who
becomes the bride of the kinsman-redeemer and returns
the disowned widow to the land (Bethlehem)which had been her birthright.