To calculate the number of days for a school holiday break for a primary school student in English, you can follow these steps:

1. Find out the start date and end date of the holiday break.

3. Add one more day to account for the starting day of the break, as students typically don't have school on the first day of the break. So, in our example, the total number of days for the holiday break would be 11 days.

Remember, this calculation assumes that the school year is continuous with no other breaks or additional days off during the specified holiday period.