Something had to be done. Those steps brought the average calendar year to 365.2425 days. That's danged close, but not close enough for the time- obsessed 20th century. That brings the average calendar year to 365.24225 days, but you'll have to wait 2,000 years to set your watch correctly. We time-crazy humans should calm down a little.
Time is a continuum.
Our calendar doesn't reflect any reality except the vagaries of solar-system motion, and it does an exceedingly poor job of that. Those astronomical and natural rhythms are as deeply ingrained in us as sleeping and eating. Our current mid-winter celebration is a violation of our most fundamental instincts. Besides, that ball they drop is usually off by a few seconds anyway. The most important fact about time is that we have so little of it.