=== BEGIN REPAIRED SPECIFICATION ===
# FEATURE: Date and Time

| Field       | Value |
|-------------|-------|
| Version     | 20260822 V1 |
| Description | Define jq date parsing, formatting, and UTC time conversion filters. |
| Depends On  | FEATURE-Type-and-Numeric-Primitives.md, FEATURE-String-Manipulation.md |
| Provides    | strptime, strftime, strflocaltime, gmtime, localtime, mktime, fromdate, todate |
| Consumes    | jq string and numeric primitives |

## Scope

Implement ISO-8601 date conversion and the low-level date filters exercised by the corpus. UTC behavior is normative for `fromdate`, `todate`, `gmtime`, `strptime`, `strftime`, and `mktime`; provide the documented local-time variants where exercised.

## Programmatic Acceptance

=== AC date-conformance ===
Intent: The authoritative corpus cases covering jq date and time filters execute successfully.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

select = r"date|strftime|strptime|gmtime|mktime"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", select, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert sum(summary.values()) > 0
assert summary["fail"] == 0 and summary["error"] == 0
assert result.returncode == 0
=== END AC date-conformance ===
Intent: The authoritative corpus verifies UTC conversion, broken-down time handling, formatting, and invalid-input runtime behavior.
Suite: scoped
Requires: executable=python3; scope=test

import json
import os
import subprocess
import sys

select = r"fromdate|todate|gmtime|localtime|mktime|strptime|strftime|strflocaltime"
result = subprocess.run(
    [sys.executable, "sources/run_conformance.py", "--select", select, "--json"],
    capture_output=True,
    text=True,
    env={**os.environ, "JQ": f"{os.getcwd()}/jq"},
)
print(result.stdout)
print(result.stderr, file=sys.stderr)
report = json.loads(result.stdout)
summary = report["summary"]
assert summary["pass"] > 0
assert summary["fail"] == 0
assert summary["error"] == 0
assert result.returncode == 0
=== END AC date-utc-and-errors ===

## User Acceptance

- None.

## Guardrails

- Date behavior must use standard-library facilities only.
- UTC conversion must not depend on the machine's local timezone.
- Invalid date inputs remain runtime errors with exit status 5 when uncaught.
=== END REPAIRED SPECIFICATION ===