Isn't this a little early for this, Lewis? Sounds like you've been hanging around me a tad too long.
Well, let's hope this is settled by Easter, or I should say, Passover.
Yes, what Jesus said, as quoted in that article does indeed indicate that he meant a full 3 days and 3 nights in the tomb (I don't agree with the Spirit part and his "job" in those 3 days but I want to deal with the timing here). Us
gnomonists understand his quote as a hidden language that assures us he meant a full day, and not part of one. He died late Nisan 14 as the Passover lambs were being slaughtered, and Nisan 15 was a high holy day (Unleavened Bread). That's when he was buried by, so Nisan 15 is the first full day in the tomb. Note that Firstfruits is on a Sunday. That was a ceremony taken place on a Sunday showing his resurrection occurred already
and his ascending to the Father (meaning this occurred the next calendar day after the resurrection). This is the wavesheaf offering. Count 3 days and 3 nights from Nisan 15 and we come to Nisan 18 which had to be a Sunday and he had to be arisen by then for the ceremonies to take place (first the cutting of the sheaf at sundown and then later the wave ceremony). Now, if the 18th is on a Sunday, what day is the 14th? Look on any calendar. The 14th is a Wednesday(late), and he arose 3 days later on the 17th on the Sabbath (late) for the ceremonies on Sunday (the 18th) to take place foreshadowing and celebrating a risen Christ.
Yes, it's amazing how people find inventive ways to count to 3 and how the calendar gets reinterpreted. But one has to understand time to come to this accurate conclusion that he died late Wednesday, buried by sundown Wednesday, and arose near sundown Saturday (72 hours later) as that day was closing and Sunday was commencing for firstfruits celebration. This is the only thing that fits the feasts, and mathematical logic. Anything else is waaaaaay too complicated (and wrong).