# modal.Period | Modal Docs

- **URL:** https://modal.com/docs/sdk/py/latest/modal.Period
- **Summary:** Create a schedule that runs every given time interval.

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modal.Period
============

    class Period(modal.schedule.Schedule)

Create a schedule that runs every given time interval.

Only `seconds` can be a float. All other arguments are integers.

Note that `days=1` will trigger the function the same time every day. This does not have the same behavior as `seconds=84000` since days have different lengths due to daylight savings and leap seconds. Similarly, using `months=1` will trigger the function on the same day each month.

This behaves similar to the [dateutil](https://dateutil.readthedocs.io/en/latest/relativedelta.html)
 package.

**Usage**

    import modal
    app = modal.App()
    
    @app.function(schedule=modal.Period(days=1))
    def f():
        print("This function will run every day")
    
    modal.Period(hours=4)          # runs every 4 hours
    modal.Period(minutes=15)       # runs every 15 minutes
    modal.Period(seconds=math.pi)  # runs every 3.141592653589793 seconds

    __init__(self, *, years=0, months=0, weeks=0, days=0, hours=0, minutes=0,
        seconds=0)

[modal.Period](https://modal.com/docs/sdk/py/latest/modal.Period#modalperiod)