For Charles, on a visit to India with wife Camilla, the celebrations were on a modest scale at the sylvan settings of the Lake Resort, where the royal couple have been staying since Tuesday evening.
Kerala Chief Minister Oommen Chandy and his family members called on the royals guests and presented gifts after extending warm birth day greeting to Charles, official sources said.
It was a day of relaxation for the Prince of Wales and Duchess of Cornwall yesterday enjoying the panoramic beauty of the palm-fringe lake. The couple swam in the pool of the resort for about an hour.
They had begun their Kerala leg of the India tour by reaching Kochi on Monday and had been to nearby Vazhachal waterfalls before coming to Kumarakom in Kottayam district.
Charles and Camilla would be flying to Colombo this afternoon where the prince would be addressing the CHOGM meeting.