Sample
date-fns 4.4.0: Format and parse an ISO date with date-fns without shifting the day
Verified sample for npm date-fns 4.4.0: Format and parse an ISO date with date-fns without shifting the day. The contract ran on node 22 · linux alpine/x64 …
sha256:895c3d4f50385ffb2b35a39afaf7960c1ae378afd175777b2b506026d0ee065e
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MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
node 22 linux x64 node 22 npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:a2ec939a4c60e243 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-13 |
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-17 |
Case
HOW- Goal
- Format and parse an ISO date with date-fns without shifting the day
- Packages
- Symbols
-
- parseISO
- format
- differenceInCalendarDays
- Environment
- node 22
- Created
- 2026-08-13T15:19:52Z
Contract
- parse an ISO 8601 string with parseISO instead of new Date
- assert format renders the pattern with date-fns tokens
- assert a date-only string is read in local time, not UTC
- assert calendar day differences ignore the clock time
Files
- csx.json
- package-lock.json
- package.json
- src/index.mjs
- test/contract.mjs