Good point. Did you know that when we went from the Julian calendar in 1582 to the Gregorian calendar we lost a Wednesday? What does that do to the equation 
Well I didn't know that because it isn’t true. What actually happened is that in October of 1582AD the first week went like this…
Sunday - September 30
Monday – October 1
Tuesday – October 2
Wednesday – October 3
Thursday – October 4
Friday – October 15
Saturday – October 16
Ten days were dropped from the year, but the weekly continuity was not disrupted. The problem is not the seven day week, but rather the inaccuracy of the Julian calendar. There was a great deal of debate over how to fix it…
“Thus, every imaginable proposition was made, only one idea was never mentioned, viz., the abandonment of the seven-day week” (Catholic Encyclopedia, Vol. 9, p. 251, article “Lilius”).
“It is to be noted that in the Christian period, the order of days in the week has never been interrupted. Thus, when Gregory XIII reformed the calendar in 1582, Thursday, 4 October was followed by Friday, 15 October. So in England, in 1752, Wednesday, 2 September, was followed by Thursday, 14 September” (Catholic Encyclopedia, Vol. 3, p. 740, article “Chronology”).
So in this happy vein, I will ask you a did you know…
Did you know that this occurred again in 1752 in the month of September? The first week of September looked like this…
Sunday – August 30
Monday – August 31
Tuesday – September 1
Wednesday – September 2
Thursday – September 14
Friday - September 15
Saturday – September 16
Again, 12 days were dropped from the calendar, but the weekly cycle was not changed or interrupted.
“In spite of all of our dickerings with the calendar, it is patent that the human race never lost the septenary [seven-day] sequence of week days and that the Sabbath of these latter times comes down to us from Adam, through the ages, without a single lapse.”
Dr. Totten of New Haven, Connecticut—Professor of Astronomy, Yale University
(
www.tagnet.org/llt/science.htm)
“It is a strange fact that even today there is a great deal of confusion concerning the question of so-called ‘lost time.’ Alterations that have been made to the calendar in the past have left the impression that time has actually been lost. In point of fact, of course, these adjustments were made to bring the calendar into closer agreement with the natural [solar] year. Now, unfortunately, this supposed ‘lost time’ is still being used to throw doubt upon the unbroken cycle of the Seventh-day Sabbath that God inaugurated at the Creation. I am glad I can add the witness of my scientific training to the irrevocable nature of the weekly cycle.
“Having been time computer at Greenwich [England Observatory] for many years, I can testify that all our days are in God’s absolute control—relentlessly measured by the daily rotation of the earth on its axis. This daily period of rotation does not vary one-thousandth part of a second in thousands of years. Also, the year is a very definite number of days. Consequently, it can be said that not a day has been lost since Creation, and all the calendar changes notwithstanding, there has been no break in the weekly cycle” (Frank Jeffries, Statement [Dr. Jeffries was Fellow of the Royal Astronomical Society, and Research Director of the Royal Observatory, Greenwich, England.]).
