To calculate 23 days, 20 hours, and 0 minutes in the future, you first convert the days to hours. There are 24 hours in a day, so 23 days would be 23 * 24 = 552 hours. Then, add the given 20 hours to get a total of 572 hours. Finally, convert the hours back to days and hours, which would be 23 days, 20 hours.