# 0 0 1 * *

**At 00:00, on the 1st of the month**

- Expression: `0 0 1 * *`
- Timezone: UTC
- Frequency: approximately 11 runs per year (0.03/day)

## Fields

| Field | Value | Meaning |
| --- | --- | --- |
| Minute | `0` | At minute 0. |
| Hour | `0` | At 00:00. |
| Day of month | `1` | On the 1st. |
| Month | `*` | Every month. |
| Day of week | `*` | Every day of the week. |

## Next runs (UTC)

- Thu, 2026-10-01, 00:00 — `2026-10-01T00:00:00.000Z`
- Sun, 2026-11-01, 00:00 — `2026-11-01T00:00:00.000Z`
- Tue, 2026-12-01, 00:00 — `2026-12-01T00:00:00.000Z`
- Fri, 2027-01-01, 00:00 — `2027-01-01T00:00:00.000Z`
- Mon, 2027-02-01, 00:00 — `2027-02-01T00:00:00.000Z`

## Warnings

### Interpreted in UTC (info)

A cron expression has no timezone of its own — the scheduler's zone decides when it fires. These times are computed in UTC. The same expression on a host in another zone runs at a different moment.

**Fix:** Set the schedule timezone explicitly (TZ= or CRON_TZ= in crontab, `timeZone` in Kubernetes, or the scheduler's own setting). Vercel Cron Jobs always run in UTC.

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Canonical URL: https://crontoenglish.com/cron/first-of-the-month
JSON API: `GET https://crontoenglish.com/api/v1/explain?expression=...`
MCP endpoint: `https://crontoenglish.com/api/mcp`