It strikes me that renewal of vows is an American custom, but I don't know when or why it started.
Here in Denmark you can choose to celebrate a wedding anniversary (usually the Golden Wedding) by having a short church service of thanks for the past years and a blessing.
Those who marry before the registrar can at any time ask for a service blessing the marriage in church.
Trying to arrange events when only one member of friendship circle still works
Could you live on a cruise ship?
What can be done about the avaricious and selfish




