A colour slide taken at a wedding in what look to by typically 1950s fashions. It's a weird image in a way because it includes the junk in the garden as well as the people in the wedding party; I know it isn't always possible to frame these sort of shots ideally, but I think I would have tried moving round a bit and try to cut out the junk!
That said I'm assuming the picture is from a member of the group's family rather than an official photographer.