harrisiirak/cron-parser

Health v2 · maintenance only

Adoption not part of the score

1491 stars · 167 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A TypeScript/JavaScript library for parsing and manipulating cron expressions. It supports timezone handling, DST transitions, predefined expressions like @daily, and iterating over scheduled occurrence dates.

Use cases

• parse cron expressions in node.js
• calculate next run time for a cron job
• iterate over cron schedule occurrences
• handle cron schedules across timezones and DST
• validate user-provided crontab strings
• convert @daily style expressions to cron fields

When to choose

• you need robust cron expression parsing with timezone and DST support in Node.js or TypeScript
• you want to enumerate future execution times of a cron schedule
• you need support for extended syntax like L, #, and H

When to avoid

• you need an actual job scheduler that runs tasks (use a scheduler like node-cron or BullMQ)
• you are not on a JavaScript/TypeScript runtime
• you need parsing of systemd timers or other non-crontab schedule formats

Facets

library · maturity active

parser scheduling date-time developer-tools developer-tools backend cross-platform cli cron crontab cron-expression typescript timezone-support dst-handling iterator automation command-line nodejs

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