That is quite practical, suggesting we think about the definition, and being careful not to get off on the wrong direction by assuming a thing called time exists. I'm not surprised that people get it wrong, what with all of the conditioning we get as individuals as we grow up; our schedules, or daily habits, our fascination with clocks and watches when we are young, our admonitions not to be "late",etc. But I don't think you are approaching the subject with adequate appreciation for what a human individual is in terms of functionality. My point is that although the now is the only moment we are ever in, and so one can claim that time does not pass in the now, we humans have internal equipment to remember past "nows", and can therefore establish our own means of orderliness in how we associate the memories of past nows. That orderliness for me is best accomplished by considering the "nows" that I remember has having a timeline that is often referred to as a continuum of nows. With that timeline of past nows, I, as an individual, can manage and use my memories of the past to benefit me in the current now.