Since today is Friday, May 9, 2025, to find out how many days until school ends on the 20th (assuming May 20, 2025, as the end date), you subtract the current date from the end date:

• May 20 - May 9 = 11 days remaining until school ends.

If you meant 20 days until school ends, that would place the last day around May 29, 2025. But if your school ends on May 20, then you have 11 days left from today

. If your school year ends on a different date, you can calculate days remaining by subtracting the current day from the last day of school or adding days in the months until the end date as explained in the countdown method