How many days are there from 20 191February 9 to 202 1 year1October 4?

According to the calendar calculation query, from 201919 to 2022 10 4 * * 1020 days, the time is 24480 hours.

Year, month and day are units of time. According to the alternation of day and night caused by the rotation of the earth, people formed the concept of "day". According to the concept that the moon revolves around the earth to form a "moon" and the concept that the seasons alternate to form a "year" caused by the earth's revolution around the sun.