World Sleep Day was launched back in 2008 by the World Sleep Society. Taking place every year since, on the Friday before the March equinox, what began as a modest awareness initiative has gradually evolved into a global campaign aimed at reframing sleep as one of the central pillars of health (alongside diet and exercise). By now, the event prompts something like 2,000 awareness activities across over 70 countries, including public lectures, clinical outreach programmes and media campaigns devoted to the science of rest and sleep.
Surveys conducted in Europe and North America regularly show that large portions of the world report insufficient sleep due to a multitude of factors that include the rise of late-night screen use, irregular work schedules and the 24-hour digital economy. The global sleep-aid industry—from meditation apps to specialised mattresses—has expanded rapidly in response, and World Sleep Day has become our annual reminder that getting a decent night’s rest is something we urgently need to defend as well as celebrate.
Over the past couple of decades, neuroscientists have shown that rest is not merely restorative but foundational: essential for memory consolidation, emotional regulation, immune function and long-term cognitive health. During sleep, the brain clears metabolic waste through what researchers call the glymphatic system, a process thought to play an important role in preventing neurodegenerative diseases. Meanwhile, chronic sleep deprivation has been linked to everything from cardiovascular disease and metabolic disorders to anxiety, depression and impaired decision-making. But wait—what has all this got to do with music?
Music & Sleep
Scientific interest in the relationship between music and sleep predates WSD. As far back as the 1970s, psychologists began studying how music might actively promote relaxation, with disciplines such as Music Therapy and Sleep Medicine emerging to explore how slow tempos, predictable structures, and low dynamic variation could lower heart rates, blood pressure and cortisol levels. Clinical trials found that calming music played before bedtime could shorten sleep latency (the time it takes to fall asleep), particularly in people with mild insomnia.
In the 2000s and 2010s, this research expanded significantly thanks to neuroimaging and larger clinical studies. Scientists began investigating how music interacts with the brain’s emotional and reward systems, particularly regions such as the limbic system and the hypothalamus, which influence circadian rhythms and sleep-wake cycles. It was discovered that listening to relaxing music for around 30-45 minutes at bedtime can measurably improve subjective sleep quality, and that music with a slow tempo (between 60-80 bpm) appears particularly effective, especially when it emphasises gentle repetition and minimal dynamic contrast.
These sonic characteristics are common in ambient and modern classical compositions—which helps explain why these genres have become closely associated with sleep-oriented listening, especially when bolstered with soft piano tones, sustained strings, and subtle electronic textures. It was only a matter of time before artists and composers in these fields began collaborating directly with scientists and back in 2015 one of the most groundbreaking projects in this realm emerged: Max Richter’s Sleep.
Richter’s eight-hour opus was designed to accompany an entire night’s rest. Combining piano, strings, electronics and soprano voice in a vast, slowly evolving soundscape, it was created in consultation with neuroscientist David Eagleman, who explained to Richter how the brain moves through different phases of sleep during the night. Drawing on the dynamics of slow-wave sleep—the deepest stage of non-REM sleep—the project is the first to comprehensively mirror the gradual descent into a restorative state.
The project was premiered in overnight concert performances where listeners were encouraged to sleep in beds placed throughout the venue, transforming the traditional concert format into a communal experiment in rest. Performances took place in unusual spaces including museums and concert halls, blurring the boundaries between installation art, performance and sleep research. The project later inspired a documentary—Max Richter’s Sleep—that followed audiences as they experienced the overnight performances.
World Sleep Day x UMG
Richter has remained central to World Sleep Day while his label, UMG, and many of its subsidiaries—including Decca and Deutsche Grammophon—have become the official music partner of World Sleep Day. It was an effortless fit, especially for DG, given its roster of ambient, neoclassical, experimental and contemporary minimalist composers, and its prior history of releasing works and curating playlists around themes of contemplation and reflection.
The official collaboration kicked off in style in 2021 by bringing together no fewer than twenty artists from eight different UMG labels to produce eighteen newly recorded lullabies and sleep-themed pieces. These were released digitally as singles and collected in a curated streaming playlist that included stand-out tracks such Ludovico Einaudi’s “Fossils”, adapted from material connected to his Seven Days Walking project; Peter Gregson’s minimalist “Somnia”, named after the Latin word for dreams; Isobel Waller-Bridge’s meticulously layered “Illumination”, and Korean composer Yiruma’s reflective and lyrical “Nocturnal Mind” for solo piano.
Richter also revisited material from Sleep, producing a new version of “Dream 3”. But while many of the artists featured already had large streaming audiences for their soothing piano or ambient works, the project also promoted newer voices—a trend that has continued in recent years. In 2023, for example, Richter once again led the fray with an EP entitled “SLEEP: Tranquility Base”—but this was accompanied by an even more ambitious compilation, this time featuring fifty new tracks by twenty-two artists from nine labels. Alongside returning contributors, the comp featured outstanding and diverse music from Joep Beving, Gabríel Ólafs, Chad Lawson, Snorri Hallgrímsson and Dustin O’Halloran.
Highlights over the last couple of years have continued with Richter’s specially-created “SLEEP: Piano Edition” EP (2024), which presented stripped-back reinterpretations of material from Sleep, as well as a brand new track, “Perihelion”, in 2025. Other notable pieces last year came from Peter Gregson (his cello-and-synth ensemble piece “Horizon”); Lara Somogyi & Jean‑Michel Blais (their disarming trio of harp-and-piano miniatures, “monarque,” “révérence,” and “aura”); Sophie Hutchings’ piano-led “Sleeping Giant” and Elliott Jack Sansom’s sweetly gentle “Opening Serenade”; plus Jess Gillam’s “Berriedale at Dawn”—a unique saxophone-led piece written by Erland Cooper for the Gillam Ensemble. Perhaps the most surprising entry to date, though, was Van‑Anh Nguyen’s lullaby version of Radiohead’s “Creep”.
World Sleep Day 2026
Which brings us to 2026. This year, UMG have pulled together a brand new compilation featuring a whopping 75-tracks—the biggest yet—including several significant single releases. Icelandic composer Snorri Hallgrímsson is responsible for one of the first releases, “The Stars Will Dim”, which is taken from his fabulous new album Nowhere Sessions.
As some will know, Hallgrímsson first gained international attention through collaborations with fellow Icelandic composer Ólafur Arnalds before developing a distinctive voice of his own, one that has been consistently characterised by warm, emotive strings and reflective piano textures. Nowhere Sessions was captured in a secluded family cabin in rural Iceland—a place Snorri describes as a personal “reset button”—and “The Stars Will Dim” is the most ideal track on the album—the only one without strings and the one with the most intimacy and restraint.
Following later in March is “Circadian Drift” by Australian neoclassical composer and pianist Cameron Segal, who has been building a stellar reputation for creating music that promotes mindfulness and tranquility. The title is a direct nod toward our body’s internal clock and carries an appositely slow pulse and subtle harmonic shifts; it sounds very much like an attempt to echo the rhythms of the sleep cycles themselves, or to perhaps navigate that blurry liminality between wakefulness and dreams.
A third single release comes courtesy of veteran British composer Roger Eno, whose music is well-known for being more nuanced and narrative than traditional ambient work, but who has also composed impressively soothing works on celebrated albums such as The Turning Year and Voices. “Tributary” creatively reimagines elements of Erik Satie’s classic “Gymnopédie No 1”, shaping it into completely new forms while retaining Satie’s original dreamy shimmer.
The 2026 compilation features many more artists already well-known for their previous World Sleep Day releases, but also some newcomers. Australian pianist Sophie Hutchings returns with “Become the Sky (Digitonal Reworks)”, which revisits her atmospheric piano music through the prism of subtle electronica; Scottish composer Erland Cooper contributes “Music For Growing Flowers”; a paean to nature in the shape of a nocturne; and Indonesian-born singer-composer Sandrayati Fay, whose music blends folksy intimacy with atmospheric arrangements. Japanese composers Akira Kosemura and Daigo Hanada—both of whom have built large international followings for their delicate piano miniatures—are also featured.
Amazon Music Specials
And there’s even more! In collaboration with Amazon Music, Grammy-winning Icelandic pianist Víkingur Ólafsson—widely celebrated for his interpretations of composers such as Johann Sebastian Bach, Philip Glass and Claude Debussy—will present an original work titled “Sleep Spiral”. The piece marks a rare moment in which Ólafsson steps into the role of composer rather than interpreter, exploring how musical pacing can evoke the psychological descent into rest with a piece that unfurls ever-more slowly towards a state of elegant repose.
And pioneering artist Brian Eno teams up again with Beatie Wolfe for “Afterlife”, a reworked version of “Before Life” from Liminal, the final instalment from the duo’s 2025 trilogy (which was preceded by the wonderful Lateral and Luminal albums). Just over six minutes long, “Afterlife” is a truly otherworldly work, merging slowly shifting textures and warm bass tones, dissolving the boundaries between melody and atmosphere. It’s yet another major ambient coup for fans of calm music and lovers of deep sleep. And it’s thanks to UMG and World Sleep Day that these fundamental aspects of life are not as far apart as they once were.
Listen to the full compilation here.
by Paul Sullivan