def iso8601_offset
import cswap-bend-cli@0.1.0.0/clock.bend as Clockimport Base
70# `2026-10-30T09:00:00+00:00`, as the reference's isoformat writes it.
71def iso8601_offset(+t: U32) -> String:
72 iso.fmt(civil((t / 86400 : U32)), (t % 86400 : U32), "+00:00")