Almost all of the advent calendars you see out there are meant for children but for my SIL it's just her and my brother and that's not stopping her! Check out her advent calendar she made especially for her husband:
First she ran to the craft store and pick up a few sheets of pretty paper.
Then added a plain paper on the back for writing her notation for the day.
She used Glue and Glitter to write the days on the front and packaged each day in tulle and a bow.
Each activity for the day is a thrifty little couples moment like a hot chocolate date or writing each other a letter.
And to hang them up she used Command hooks to put them above her fire place.