# X_TEST_ISLAND_STATE_CLOCK_INVALID

## Means

an island state manifest pins a clock that is not pinnable

## Typical cause

`timeZone` is not an IANA zone `Intl` knows, or `now` carries no explicit offset. A harness that freezes the instant and leaves the ZONE ambient renders every date in the host machine's, so one state photographs differently on two machines

## Fix

write `timeZone: 'UTC'` and `now: '2026-01-01T00:00:00.000Z'` — an ISO instant ending in `Z` or an offset

[Testing](/error-codes#testing)