holiday coincidence

My 50th birthday fell on June 27 1999. To celebrate, my husband (Terry) and I (Barbara), enjoyed the last two weeks of June on the Greek island of Crete. We stayed in a small complex of self catering accommodation and became friendly (holiday friendships only, we did not keep in touch) with most other holidaymakers round the pool, who included Grace and Bob an older couple. Over the years It became a habit for us to spend the last 2 weeks in June on other Greek Islands, as our birthdays fall on 26 and 27 June. We were therefore on the island of Zante at the end of June 2011. We always try different restaurants for our evening meal, wherever we are. On this particular evening during the second week of our holiday, we were just finishing our meal at a restaurant. It was quite a large restaurant and very busy. Our table was facing the entrance. A couple walked into the restaurant and we recognised them as Grace and Bob. What are the odds of that happening. All four of us being on that island, in that restaurant, at that particular time and our table facing the entrance so we saw them. Also, during conversation, Grace told us that she was now 74 years old. Which means she was 62 in Crete. I was 62 when we met themagain in Zante!