There are some scents that instantly bring back memories, and the smell of cloves and oranges always make me think of Christmas. When my husband and I were first married, I made a Christmas centerpiece with pine branches from a tree in our backyard, and I put them in a little basket. On top I added an orange in which I had inserted rows of whole cloves, and oh my gosh, it smelled heavenly for over a week.
If you ever try this, here is a tip: Use a pushpin or other sharp item to make pilot holes, and then insert the cloves into those holes rather than trying to push them directly into the orange. Your fingertips will thank you!