"C'est une belle journée" (English: "It's a Beautiful Day") is a 2001 song recorded by French singer-songwriter Mylène Farmer.

The song contains melancholy lyrics set to dance music and was illustrated by a cartoon video produced by Farmer's boyfriend.

In February 2002, Universal and Stuffed Monkey decided to release "C'est une belle journée", one of the three unreleased songs from the compilation Les Mots and officially announced it in March.

[6] Expert of French charts Élia Habib considered that "C'est une belle journée" "has an intro worthy of a 1980s opus of Pet Shop Boys" and said it "is a song with a tempo surprisingly cheerful"; however, he maintained: "Under this cover unusual are concealed again recurring themes of the Farmer anthology: death, nostalgia, vision of a world torn between good and evil, brevity of life".

[7] To author Erwan Chuberre, "C'est une belle journée" is "a catchy and joyful song at the first hearing but that turns out to be, finally, rather dark", and has "a lot of irony and humor".

[8] According to French magazine Instant-Mag, "we find [in this song] all Farmer and Boutonnat's art of the beautiful time, namely involve very delicately melancholy lyrics and skipping music, or even a bit commercial".

"Apology of suicide, sleep, pessimism, departure", the song is "a call to sacrifice, to let go, to flee to a world of spiritual and physical peace".

Farmer is in a pessimistic perspective, referring to the death behind the apparent sleep, the emptiness instead of the full, the completion instead of the beginning, and the flight as a reunion."

However, as noted by psychologist Hugues Royer, suicide evoked in the lyrics is intended to relieve a too heavy sadness, but to avoid, paradoxically, the horizon of a possible happiness.

There are also rumors about the fact that the video would be produced from the singer's drawings – and that was right -,[12] as it had done for the CD maxi and vinyl's covers for "Dessine-moi un mouton".

[1] Finally, for the first time in the star's career, the video, directed by Benoît Di Sabatino, was produced as a cartoon film.

In this context, the dead tree could illustrate the faded beauty of the world, the spider would be the personification of the singer's black thoughts, while the sheep would represent Farmer's lost dreams and deepest disillusionment.

It debuted at a peak of number five on 20 April and remained for ten weeks in the top 20, thanks to numerous broadcasts by various radio stations.

For the first and only time, she appeared in the trailer, announcing her own performance in the broadcast (the fact that the singer sang that day for a humanitarian cause may have been a factor).

When the song started, the letters CUBJ (the acronym of "C'est une belle journée"), then drawings from the music video, appeared on giant screens in the back of the stage.

In 2003, the single was covered by French singers MC Solaar, Alain Souchon and Jean-Louis Aubert, during the Les Enfoirés tour.