A property is under an effectively dated contract of April 23rd, with a 15-day financing contingency extending through the date of May 8th. A back-up offer is properly executed on May 6th. The first buyer properly notifies the seller in writing on May 7th that a loan cannot be obtained and requests in writing a return of earnest money, which occurs on May 9th, the day the second buyer receives notification that the first contract terminated. The date for starting performance by the buyer on the back-up offer is