The whole notion of holding 'zero' of an item is, I believe, more of a philosophical topic than we/I seek here.
"The point about zero is that we do not need to use it in the operations of daily life. No one goes out to buy zero fish." - Alfred North Whitehead (1861-1947), English mathematician/philosopher
However, given that the issue has been raised, I would suggest that the question of holding 'zero' pennies may be a dip into Sartre's Being and Nothingness, a tome that (I admit) is one I have yet to fully digest.
Though I am not completely schooled in existentialism, I would argue that the concept of 'nothingness' applies to zero in the pennies' conundrum.
If I offer to give Kate in Greensboro -- my dear, I hope you don't mind if I use you in this experiment -- some pennies and ask her to cup her hands in front of me... then place zero pennies in her hands, no transaction has occurred.
Kate is not financially enriched (though an argument could be made that she is 'rewarded' in essence by the exercise... *snark*) and I am not subsequently poorer as a result. Saying that I gave Kate no pennies would be accurate, yet somewhat misleading... since there is no evidence that I transferred anything substantially.
'Kate is holding zero pennies' suggests that an item exists that Kate can actually hold. In this instance, it is more correct and inherently more logical to say that 'Kate is not holding any pennies'.
Extrapolating this concept to the original article... the passage of 'zero' time is immeasurable. Of course, the act of suggesting that 'zero' time may have passed would consume a real segment of time... so the argument withers on the vine.
Where, you ask, does this connect with the previous discussion of false assumptions regarding the end of the decade?
Honestly, I don't know. It was suggested that decades begin on January 1st of years that end in zero. My argument is that the second decade of the AD/CE could not begin on 01/01/10 because that would entail the first decade to include only the years 1 through 9 AD/CE... and nine years does not a decade make.
What am I trying to prove here?
If you visit my column or read many of my postings, you know by now that I pride myself in being a smart-ass.
To paraphrase René Descartes... "I snark, therefore I am".