---
title: What does WORKING_HOURS_FAIL (Outside Working Hours) mean?
description: "Your message was not sent because it fell **outside the allowed sending window** (working hours) for your account or route. The message was rejected to comply with time-based rules. **What you can do:** Send during the configured working hours, or request a change…"
url: "https://www.smsgatewaycenter.com/blog/kb/what-does-working_hours_fail-outside-working-hours-mean/"
updated: "2026-05-05"
category: "Bulk SMS / Errors & Error Codes"
---

# What does WORKING_HOURS_FAIL (Outside Working Hours) mean?

Your message was not sent because it fell **outside the allowed sending window** (working hours) for your account or route. The message was rejected to comply with time-based rules.

**What you can do:** Send during the configured working hours, or request a change to your account’s sending window if your use case requires it.

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