Bring the water to the boil, add the sugar, add the tea and thyme and let everything steep for about six minutes.
Core the cherries. Add the pitted cherries, the peel of the lemons and the sour cherry juice to the tea and refrigerate for 24 hours.
Note: The tea is already very tasty, if a little sweet. I will use a little less sugar in the future, but you can still add 8 tablespoons of lime syrup, which makes it even fresher. You could also add some fresh ginger or use it instead of the lemon peel.