---
name: rfc3339-date
description: Use this skill for strict RFC3339 time lookups, validation, conversion, timezone resolution, and human event-time conversion on rfc3339.date.
---

# rfc3339.date

Use this skill when a task needs precise timestamp handling through the public rfc3339.date API.

## Base URL

`https://rfc3339.date`

## API Description

- OpenAPI JSON: https://rfc3339.date/openapi.json
- OpenAPI YAML: https://rfc3339.date/openapi.yaml
- Load the OpenAPI description when a task needs exact parameter names, supported formats, or response fields.

## Main Tasks

- Get the current time in UTC or a requested IANA timezone with `/now` and `/now/{tz}`.
- Validate timestamps with `/validate`.
- Convert between RFC3339, Unix, HTTP-date, emaildate, GPS, TAI, Excel, and related formats with `/convert`.
- Convert human-written event text into a concrete instant with `/tz/convert`.
- Resolve timezone aliases with `/tz/resolve`.

## Guidance

- Prefer JSON output by adding `?json=1` when a task needs structured results.
- Use `/tz/convert` for relative or ambiguous event text such as `tomorrow 10am PST`.
- Use `/tz/resolve` before conversion when a task starts with a Windows timezone alias.