What Remote Work Did to Everyone's Sleep

Remote workers struggle with consistent wake times because working from home removes the external time cues — commutes, coworkers, scheduled meetings with physical presence — that anchor the circadian system to a fixed daily schedule. Without these cues, sleep timing drifts later by default.

In March 2020, without coordinating with each other, approximately 40 million Italian workers moved their wake time 28 minutes later. No one made a decision. No one announced a policy. The shift was documented by Nicola Cellini and colleagues at the University of Padova in a 2020 paper in the Journal of Sleep Research, tracking sleep patterns before and during the first COVID-19 lockdown. Bedtimes moved later. Wake times moved later. The two didn’t shift by equal amounts — people went to bed 25 minutes later but woke 28 minutes later, meaning total sleep time increased slightly while circadian timing delayed uniformly.

What Cellini’s team observed in Italy was not a uniquely Italian response. It was a circadian system doing what circadian systems do when deprived of external timing signals: it drifted toward its free-running tendency, which for most adults is slightly later than the schedule imposed by work.

What social zeitgebers actually are

The term comes from Jürgen Aschoff, the German chronobiologist who spent decades at the Max Planck Institute for Behavioral Physiology studying how external cues entrain biological rhythms. Aschoff coined “zeitgeber” — German for “time giver” — to describe any environmental signal that synchronizes the internal clock to external time. Light is the most powerful zeitgeber. But Aschoff and his colleagues also documented social zeitgebers: the timing of meals, the arrival of coworkers, the structured start time of shared activities.

Social zeitgebers work differently than light. Light acts directly on the suprachiasmatic nucleus, the hypothalamic cluster that functions as the master clock. Social cues work more indirectly, through the secondary clocks distributed throughout peripheral organs and through behavioral regularities that compound over time. A consistent meeting at 9am trains the body to be alert at 9am not through any single signal but through the accumulated regularity of showing up, being awake and functional, and experiencing the social and cognitive demands of that hour.

The commute, specifically, bundled several zeitgebers at once. It delivered morning light exposure. It involved physical movement. It placed the person among other people at a fixed time. It imposed a hard deadline — if you were not out the door by 7:45, consequences followed. None of this was designed as a chronobiological intervention. It emerged from the organizational logic of shared physical space. But the biological effect was real.

What happened during COVID

Cellini’s 2020 study is the most cited snapshot of lockdown’s effect on sleep timing, but the pattern it documents was replicated across Europe and North America. The headline number — 28 minutes of average wake time delay — understates the effect on the people most affected, because it is an average across people with very different starting points.

Elise Facer-Childs at the Monash University Turner Institute for Brain and Mental Health has spent years documenting what she calls chronotype mismatch — the performance cost incurred when people work at hours misaligned with their biological peak. In a 2019 paper in Science Advances, Facer-Childs found that evening-type people perform 26% worse on cognitive tests administered at 8am than morning types tested at the same hour. The performance gap closes substantially when evening types are tested at their peak hour instead.

What this means for remote work is specific: the office schedule, with its fixed start times and social pressure to be functional by 9am, forced evening types to perform at a chronobiologically suboptimal hour — but it also prevented them from drifting into schedules that would make the mismatch even worse. Working from home removed both the constraint and the anchor. Some evening types gained flexibility that genuinely improved their performance. Many others drifted into schedules that felt comfortable but accumulated a different kind of cost: the loss of the shared calendar, the erosion of consistent timing, and the growing difficulty of synchronizing with morning-type colleagues and clients.

The commute was biology, not bureaucracy

The standard framing of remote work treats the commute as pure overhead — time spent getting somewhere rather than doing anything. The chronobiological record suggests this misses something. The commute was accidental biology: an externally imposed, socially enforced daily ritual that happened to deliver morning light, physical activity, and social contact at a fixed time. No employer designed it as a zeitgeber. No HR department optimized it for circadian entrainment. But those were its effects.

This matters for how remote workers try to replace it. The instinct is to substitute something functionally equivalent — a morning walk, a simulated “commute” that ends at the desk rather than an office. That instinct is correct as far as it goes. A 20-minute walk at 7:45am delivers light exposure and movement at roughly the same time as a commute would have. A standing coffee meeting with a roommate or partner at 8:30am provides a social cue at a fixed hour.

What is harder to replace is the hard deadline. The commute had consequences for missing it. The simulated commute does not, unless consequences are deliberately engineered. A morning run that can start at 7am or 8am or 9am depending on how you feel is not doing the same chronobiological work as a train that leaves at 7:52.

The performance cost of drifted schedules

The 2023 American Time Use Survey from the Bureau of Labor Statistics found that remote workers begin their workday an average of 41 minutes later than office workers. This is not simply a lifestyle preference. For anyone who must synchronize with office-based colleagues, clients in different time zones, or morning meetings — and most remote workers must — a 41-minute average delay represents a meaningful mismatch between biological timing and social obligation.

Facer-Childs’ 26% cognitive performance gap is worth pausing on. It is not a finding about sleep deprivation. The participants in her study were adequately rested. The gap reflects chronotype mismatch alone — the cost of performing complex cognitive work at the wrong time for your circadian system. Remote workers who drift to later schedules and then attend 8am video calls are not running on insufficient sleep; they may be running at the wrong phase of their biological day entirely.

What to replace the zeitgebers with

Replacing accidental biology requires deliberate substitution. The evidence points toward a few specific strategies, not as productivity hacks but as chronobiological interventions with actual mechanisms.

Morning light exposure within thirty minutes of waking is the highest-leverage single intervention for circadian anchoring. Not phone light — outdoor light or a 10,000-lux lamp, which delivers roughly fifty times the photons of typical indoor lighting. This is what the commute provided without requiring conscious effort.

Fixed social commitments at a consistent morning hour — a video call, a standing check-in, any shared obligation that starts at the same time — provide the social zeitgeber that shared office space used to supply. The key variable is consistency. A meeting that happens every day at 9am trains the system differently than a meeting that sometimes happens at 9am.

The hardest thing to replace is the stake. The commute punished lateness through consequences that were automatic and external. Recreating that requires deliberately importing consequences into a context that otherwise has none — which is a different problem, and a harder one.

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Marisol Pereira, a UX researcher in Austin, Texas, noticed in late 2022 that she had stopped setting an alarm. She was working fully remote, her first call was usually at 10am, and she told herself she was finally “sleeping optimally.” By January 2023, she was waking consistently around 9:15, eating breakfast at 10:30, and finding it nearly impossible to make useful progress before noon. She made one structural change: she committed to a 7:30am video call with a friend in a different city — not for work, just as a fixed anchor point. Within three weeks her wake time had stabilized at 7:15. The call had no content that mattered. The hour mattered.

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Frequently Asked Questions

Why do remote workers tend to wake up later than office workers? Remote workers lose the social zeitgebers — time-anchoring cues like commutes, shared schedules, and physical coworker presence — that regulate circadian timing in office environments. Without these external anchors, sleep timing drifts toward its biological default, which for most adults is slightly later than a standard work schedule demands. The 2023 American Time Use Survey found remote workers start their day an average of 41 minutes later than office workers.

Did COVID-19 lockdowns actually change people’s sleep schedules? Yes. Cellini et al. (2020, Journal of Sleep Research) tracked Italian workers before and during the first lockdown and found wake times shifted 28 minutes later on average. This pattern was replicated in multiple countries and represented the circadian system responding to the loss of external time cues, not a deliberate choice.

What is a social zeitgeber? A zeitgeber (from German, “time giver”) is any external cue that synchronizes the internal circadian clock to environmental time. Jürgen Aschoff at the Max Planck Institute coined the term and documented that social cues — meal times, shared schedules, coworker arrival — function as secondary zeitgebers alongside light. The loss of these cues in remote work is a primary reason sleep schedules destabilize.

Does a later wake time actually affect performance? Yes, in ways that go beyond tiredness. Elise Facer-Childs (Monash University, Science Advances, 2019) found evening-type people perform 26% worse on cognitive tests at 8am than morning types — with both groups adequately rested. The gap reflects chronotype mismatch, not sleep deprivation. Remote workers who drift to late schedules and then attend early meetings may experience this cost.

What is the best way to stabilize a remote work sleep schedule? The most effective interventions address the underlying problem — missing zeitgebers — rather than trying to enforce wake time through willpower. Morning light exposure within thirty minutes of waking, fixed social commitments at a consistent early hour, and deliberately engineered consequences for missing them are the three levers with the strongest mechanistic backing. The commute happened to deliver all three incidentally; remote workers have to construct them intentionally.