For me, it's a day when I can sleep in and wake up whenever I want...lounge in comfortable clothes all day and read a book or study without interruption while drinking hot tea or coffee. It's have a purring cat snuggled up on my lap and watching a good movie in the television. It's snuggling up with my boyfriend in bed at night and sharing body heat. It's a cold walk in the middle of a snowy winter night, with my boots crunching against the hard-packed snow.
It's little things that leave some kind of sensory impact on my mind.