Andrew Huberman· PhD
Data also say “lock the clock” is better than shifting 2x per year so we can’t lose!
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Data also say “lock the clock” is better than shifting 2x per year so we can’t lose!
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
If they won’t do that, then lock to daylight savings.
“Locking the clock” is the right thing to do say the circadian health data BUT better to lock to Standard Time as getting more morning sunlight is crucial for health & for sleep patterns.
Locking to daylight savings second best. Third best is what we do now.
Third best is what we do now.
I’ve argued for locking the clock being better than shifting. Put differently: locking to standard time would be best.
10 minutes of bright outdoor light within the first hour of waking anchors the circadian phase and improves sleep onset that night.
Morning sunlight exposure shifts the cortisol awakening response forward, improving daytime alertness.
Long-term morning sunlight reduces age-related macular degeneration risk.
Sleep regularity predicts all-cause mortality more strongly than sleep duration.
Tracking deep sleep on a wearable accurately reflects EEG-measured slow-wave sleep.
Caffeine has a half-life long enough that consumption after 2pm measurably degrades deep sleep in slow metabolizers.