The Alexandra couple met at a Scottish country dance in Balclutha when they were both 18 and they "just clicked", Mrs Lloyd said.
Both are now aged 90 and find it hard to believe they have clocked up seven decades of marriage.
"I guess you could say that blind date was successful. It's all worked out pretty well really," Mr Lloyd said.
They raised a family of nine - six daughters and three sons - and now have 23 grandchildren and 17 great-grandchildren.
One daughter died several years ago, but their other children, who live throughout New Zealand and in Australia, and some grandchildren and great-grandchildren will join them today.
"We didn't want any great fuss or celebration, so they're all coming to our place, and we'll have lunch together," Mr Lloyd said.
The couple still live in their own home, complete with an immaculate section and vege garden.
They attribute their good health to home-grown produce, including beans, broccoli, cabbage, carrots, onions, parsnips, leeks, cauliflower and tomatoes.
"Quite often with our meal, we'll have five different veges on the plate," Mrs Lloyd said.
Like the rest of their activities, the vege garden is the result of team work.
Mr Lloyd's eyesight is fading, but he digs the garden and marks the rows, then Mrs Lloyd plants the seeds.
However, they are quick to point out that while they still enjoy each other's company, it is not all plain sailing.
"We enjoy a good argument - not a row-just a good argument, every now and again," Mrs Lloyd said.
"And then we agree to disagree," her husband added.
They started married life at Clinton, then moved to Balclutha, where Mrs Lloyd was the first woman elected to the then-Balclutha borough council.
Mr Lloyd, who worked for Wrightcars, said the couple had owned 48 cars during their married life, as well as some "old dungers for the kids to drive".
They shifted to Alexandra 37 years ago.
They had always led an active life, with sport high on the agenda.
Tennis, badminton and golf were among their shared interests and they were also keen anglers.
Boating holidays were popular when their children were young.
Laughter was an important ingredient in a successful marriage, they said.
