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Why tomorrow is predicted to be a tiny bit shorter than a typical day

NPR

By Nell Greenfieldboyce

Published July 21, 2025 at 3:16 PM CDT

The days have been shorter than normal, at least if you count your time in milliseconds.

Copyright 2025 NPR

Nell Greenfieldboyce

Nell Greenfieldboyce is a NPR science correspondent.

See stories by Nell Greenfieldboyce

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