Time management using color

I propose another option to make yourself more organized and everything is in time. I made several calendars, and painted them in different colors. Making a new entry for the day, I choose a calendar and the event takes on the color of the calendar. Now I can accurately allocate my time - when I need to be in the office, when I need to call, and when to go somewhere. Made on iCal (MacOS) but I think other calendars support this. The picture is clickable