Cron on Azure Functions: NCRONTAB Timer Triggers
Schedule Azure Functions with timer triggers using NCRONTAB expressions. Understand the six-field format, UTC vs local time, and singleton mode.
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Tags: developer-tools, cron, azure
Cron on Azure Functions: Timer Triggers With NCRONTAB Expressions Azure Functions Timer Trigger uses NCRONTAB — a 6-field cron variant with a leading seconds field. This catches developers off guard when migrating from Linux cron or AWS EventBridge. This guide covers the format, the key differences, the object, timezone configuration, and when to reach for Durable Functions instead. NCRONTAB vs. Standard Cron Standard unix cron uses 5 fields starting with minutes. NCRONTAB adds a seconds field at the front: Every schedule expression in Azure Timer Triggers is 6 fields. If you paste a 5-field cron expression, Azure will reject it or misinterpret it. Use theproductguy.in/tools/cron-parser to validate 5-field expressions, then prepend for the seconds field when copying to Azure. Basic Timer…
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