Missed appointments

An old customer called yesterday. Her daughter and son-in-law bought a victorian house set in the country. The old customer gave me the wrong address and phone number. I set up an appointment to look at the house "next" weekend on the April 8. I meant on 4/15. He called up wondering where I was at this morning for the 10:00 AM appointment. All my kids birthdays fall in April and 2 of my grandkids birthdays fall in April. Then there is Easter. Just too many dates to rememember. Only the second missed appointment in 25 yrs of business.