The voice that breathed o'er Eden, / That earliest wedding day.

And taught by thee the Church prolongs Her hymns of high thanksgiving still.

You can't do it the day before the wedding. You can't take out a policy immediately before the wedding. You'd want to do it at least a few weeks beforehand.

Old Hob was lately married in the Night, What needed Day, his fair young Wife is light.

I wouldn't look for a shotgun wedding. I'd look for a number that can settle the situation,

The day of my wedding is pre-ordained. Come - let's gather together and pour the oil over the threshold.