In response to: http://www.fivedoves.com/letters/apr2011/susannap419.htm
 

Yes, that’s exactly what the Creation Calendar website says.  Nisan 16th is always the day after the Sabbath (first day of the week) and therefore Firsfruits.

[By the way, “3 days” or “3 days and 3 nights” in ancient Hebrew usage doesn’t mean 72 hours like we mean nowadays, it just means any set of 3 consecutive days, be them complete or incomplete. So Nisan 14th is day # 1 (even if the event took place in the last minutes of Day # 1), Nisan 15th is day # 2 , Nisan 16 is day # 3. That method of referring to blocks of time is also known as “inclusive reckoning”.]
 

Creation Calendar website also says that Pentecost falls on the 29th day of the 4th Hebrew month (later named “Tammuz”), which in 2011 falls on July 31st.
 

Blessings,
 

Eliane