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One maintainer keeps the time zone database used across billions of phones current

sheets.works 12 min read Editor score 7/10

The time zone database supplies clock rules to Android and iPhones, and Paul Eggert has coordinated updates since 2012; a recent release accounts for Manitoba’s move to permanent UTC−05. The story highlights the maintenance burden behind widely shared infrastructure.

What

The time zone database is a text file of clock rules used by phones and servers to determine local time.

How

Paul Eggert maintains the file; of 251 changes in the last year, 218 were his and 28 were Tim Parenti's.

Why it matters

Systems that depend on local time rely on a widely used file maintained by a small number of contributors.

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