My dreaming took a turn towards nostalgia last night...
Based entirely on @Alex's answer, this could be
a white Christmas, because
- the Braille letters for "christmas" are in white rather than black,
- the music tag indicates a reference to the song "White Christmas", whose opening line "I'm dreaming of a white christmas" echoes the sentiment in the opening line of the question and
- @S. M. points out that White Christmas is also a movie, explaining the movie tag.
I don't know if it's all there is to get but:
It is Braille alphabet but the dots are inverted (a dot means a blank in the actual alphabet, a blank means a dot)