Dear Doves,
 
The following link provides a good discussion of when the Feast of Pentecost should be celebrated.
 
http://lunarsabbath.us/id14.html
 
My takeaway is that 50 days after the seventh Sabbath, in the 4th or 5th month, is the best answer to the question. For this year, 2011, that makes July 30/31 the date for the Feast of Pentecost. Hopefully, this will be the date for the rapture of the Church.
 
Thanks to Eliane, Nando and others for taking the initiative regarding this matter.
 
YBIC,
 
Robert