On the marriage record:
Now that I look again, the date that I listed for the birthdate could have been the immunization date for the bride and groom and not the birthdate (because it was obviously wrong on Maren Kirstine's)
Anyway, I looked up the birth record of Hans Peter Hansen and found one good possibility:
Kalvehave parish, Praesto county, Denmark (on Arkivalieronline.dk)
Hans Peter Hansen, born: 27 March 1854, Christened: 28 May 1854 in church.
Parents: Hans Larsen and Kirsten Laursdatter of Viemose.
Then I found the family of Hans Larsen and Kirsten Larsdatter in Viemose, Kalvehave, Praesto, on the 1855 census with a family of five children, and Hans P. Hansen is age 1.