# of days

AAA Bank bought an interest rate floor with a 1 year maturity and quarterly settlement payments on April 1, July 1, October 1, and next year January 1

For calculating the effective interest on July 1 the number of days I should use will be 91 days

April – 29 days

May – 31 days

June - 30 days

July – 1 day

Kindly confirm if the above is correct.