For those of you who are not watching Dr. Barry Awe's  detailed and lengthy studies ( you are missing some fascinating scripture revelations) I will try to summarize here some of his thinking with links.

First, he has borrowed from "God a Minute" on youtube the idea that timing must be based on the lunar cycle for months, not  Jewish or Gentile calendars. Gen 1:14. See the explanation here....https://youtu.be/iw5OdCziUjM

Second, he sees a consistent pattern of dates, a repeating cycle, in Exodus, in Noah's dates, at Jericho, in Ruth , in Esther, etc. This cycle points to a rapture date as consistent with the Biblical date pattern

Third, Dr Awe maintains that Shavuot is not the same as Pentecost. Based on Numbers 7 he believes that Shavuot was at least  a 14 day (possibly longer) celebration. In Numbers 7 each of the 12 tribes presented an offering , one tribe per day, and the offering matches exactly the required offering in Leviticus 23 for Shavuot. So 12 day plus 2 Sabbaths is at least 14 days. 

Pentecost then follows at 49 days plus 50 days , 99 days total, after Passover, in late Summer.The issue of Pentecost at 50 days or 99 days makes more sense at 99 days based on scripture and the cycle pattern.... There are other good Biblical reasons to lean toward Pentecost at 99 days , a late summer date....  One Link to Dr Awe... https://youtu.be/KHDKhk67uNM 

Dr Awe indicated that June 25-26  2021 was 1335 days (?) from the "GREAT SIGN" of Revelation 12 which took place on 9-23-2017. I missed his calculation on this and explanation. Dan 12:12

Dr Awe concludes that all of the Old Testament texts which reference or connect to a  rapture date (Psalm 90:10) or Shavuot include the Hebrew  word "Natsal" , in code meaning "snatch away, rescue", etc....

Daniel 10:13-14 indicates that Daniel's prayers were delayed by 21 days and that this delay has some application to the end times. If Dr Awe is correct regarding June 25-26 and 21 days of delay is the correct conclusion of Shavuot (?) then we are looking at the 9th of AV , July 17th. The 9th of AV is an historic day of "sudden, terrible calamity "