---
title: schedules
sidebarTitle: schedules
---

# `prefect.schedules`



This module contains functionality for creating schedules for deployments.


## Functions

### `Cron` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/schedules.py#L72" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
Cron(timezone: str | None = None, day_or: bool = True, active: bool = True, parameters: dict[str, Any] | None = None, slug: str | None = None) -> Schedule
```


Creates a cron schedule.

**Args:**
- `cron`: A valid cron string (e.g. "0 0 * * *").
- `timezone`: A valid timezone string in IANA tzdata format (e.g. America/New_York).
- `day_or`: Control how `day` and `day_of_week` entries are handled.
Defaults to True, matching cron which connects those values using
OR. If the switch is set to False, the values are connected using AND.
This behaves like fcron and enables you to e.g. define a job that
executes each 2nd friday of a month by setting the days of month and
the weekday.
- `active`: Whether or not the schedule is active.
- `parameters`: A dictionary containing parameter overrides for the schedule.
- `slug`: A unique identifier for the schedule.

**Returns:**
- A cron schedule.

**Examples:**

Create a cron schedule that runs every day at 12:00 AM UTC:
```python
from prefect.schedules import Cron

Cron("0 0 * * *")
```

Create a cron schedule that runs every Monday at 8:00 AM in the America/New_York timezone:
```python
from prefect.schedules import Cron

Cron("0 8 * * 1", timezone="America/New_York")
```


### `Interval` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/schedules.py#L128" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
Interval(anchor_date: datetime.datetime | None = None, timezone: str | None = None, active: bool = True, parameters: dict[str, Any] | None = None, slug: str | None = None) -> Schedule
```


Creates an interval schedule.

**Args:**
- `interval`: The interval to use for the schedule. If an integer is provided,
it will be interpreted as seconds.
- `anchor_date`: The anchor date to use for the schedule.
- `timezone`: A valid timezone string in IANA tzdata format (e.g. America/New_York).
- `active`: Whether or not the schedule is active.
- `parameters`: A dictionary containing parameter overrides for the schedule.
- `slug`: A unique identifier for the schedule.

**Returns:**
- An interval schedule.

**Examples:**

Create an interval schedule that runs every hour:
```python
from datetime import timedelta

from prefect.schedules import Interval

Interval(timedelta(hours=1))
```

Create an interval schedule that runs every 60 seconds starting at a specific date:
```python
from datetime import datetime

from prefect.schedules import Interval

Interval(60, anchor_date=datetime(2024, 1, 1))
```


### `RRule` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/schedules.py#L187" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
RRule(timezone: str | None = None, active: bool = True, parameters: dict[str, Any] | None = None, slug: str | None = None) -> Schedule
```


Creates an RRule schedule.

**Args:**
- `rrule`: A valid RRule string (e.g. "RRULE\:FREQ=DAILY;INTERVAL=1").
- `timezone`: A valid timezone string in IANA tzdata format (e.g. America/New_York).
- `active`: Whether or not the schedule is active.
- `parameters`: A dictionary containing parameter overrides for the schedule.
- `slug`: A unique identifier for the schedule.

**Returns:**
- An RRule schedule.

**Examples:**

Create an RRule schedule that runs every day at 12:00 AM UTC:
```python
from prefect.schedules import RRule

RRule("RRULE:FREQ=DAILY;INTERVAL=1")
```

Create an RRule schedule that runs every 2nd friday of the month in the America/Chicago timezone:
```python
from prefect.schedules import RRule

RRule("RRULE:FREQ=MONTHLY;INTERVAL=1;BYDAY=2FR", timezone="America/Chicago")
```


## Classes

### `Schedule` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/schedules.py#L19" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


A dataclass representing a schedule.

Note that only one of `interval`, `cron`, or `rrule` can be defined at a time.

**Attributes:**
- `interval`: A timedelta representing the frequency of the schedule.
- `cron`: A valid cron string (e.g. "0 0 * * *").
- `rrule`: A valid RRule string (e.g. "RRULE\:FREQ=DAILY;INTERVAL=1").
- `timezone`: A valid timezone string in IANA tzdata format (e.g. America/New_York).
- `anchor_date`: An anchor date to schedule increments against; if not provided,
the current timestamp will be used.
- `day_or`: Control how `day` and `day_of_week` entries are handled.
Defaults to True, matching cron which connects those values using
OR. If the switch is set to False, the values are connected using AND.
This behaves like fcron and enables you to e.g. define a job that
executes each 2nd friday of a month by setting the days of month and
the weekday.
- `active`: Whether or not the schedule is active.
- `parameters`: A dictionary containing parameter overrides for the schedule.
- `slug`: A unique identifier for the schedule.

