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Calendar & time tools

Free online helpers for .ics files, cron schedules, and timestamps — aligned with calendar/time reference queries without claiming full RFC engines.

• iCalendar (.ics) Validator

  Lint BEGIN/END nesting and basic VCALENDAR structure in calendar exports.

• Unix Timestamp Converter

  Convert epoch seconds/ms ↔ ISO date-time for logs and APIs.

• Cron Expression Explainer

  See next run times and a human-readable summary of crontab expressions.

• Date-Time Format Validator

  Validate ISO 8601 / RFC 2822 strings and normalize output.

• vCard Validator

  Shallow lint for contact cards often shipped with calendar workflows.

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