(This countdown to March) it became the 5 days of the month that this insert. The net result of this month's Insert causes a 22 or 23 days that year, and the increase in the total result, 377 or 378 days there that year.
(The Countdown to March) became the fifth day of the month is inserted. The net result of inserting this month has increased by 22 or 23 of that year. As a result, a total of 377 or 378 days a year.
(the countdown to March) became 5 days of the month inserted. The net result of the insertion of this month has 22 or 23 increasing day that year, and as a result, a total that year is 377 or 378 days.