DST Shows Up in LIGO Data

A new arXiv preprint by Reed Essick finds LIGO’s detector sensitivity shifts by about 75 minutes at the biannual daylight‑saving time change, as human activity and operations schedules move. Weekends and time‑of‑day also imprint on the detector, pointing to human rhythms as a systematic in gravitational‑wave astronomy. — It adds a science‑and‑infrastructure cost to the daylight‑saving debate, suggesting time policy and lab operations can measurably affect billion‑dollar observatories.