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SKILL verified MIT Self-run

Python Datetime

skill-owenlamont-agent-skills-python-datetime · by owenlamont

Work with dates, times, and timezones to this project's standards. Use when creating, parsing, serialising, comparing, or storing datetimes, or handling timezones.

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Install

$ agentstack add skill-owenlamont-agent-skills-python-datetime

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

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Reliability & compatibility

✓ Security review passed
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Declared compatibility

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Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

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About

Python Datetime

Standards for dates, times, and timezones, using the standard library datetime and zoneinfo.

Timezones

  • Always use timezone-aware datetimes; never naive ones. Attach a zone at the boundary

where a value enters the system.

  • Use the standard library zoneinfo for timezones, not pytz (whose legacy

localize() dance is a frequent source of bugs).

Serialising and parsing

  • Serialise with ISO 8601 via isoformat() and parse with fromisoformat() — not

strftime/strptime with a hand-written format, and not all-digit numeric formats.

  • When parsing datetimes in pandas, pass an explicit format= to pd.to_datetime rather

than relying on inference.

Pitfalls

  • Be careful using datetimes as dict keys or set members: two values for the same instant

can carry different tzinfo objects and hash differently, so a lookup silently misses. Normalise to one zone (e.g. UTC) first.

See python-pandas for typing DataFrame timestamp columns as pd.Timestamp.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.

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