# modal.Period

```python
class Period(modal.schedule.Schedule)
```

Create a schedule that runs every given time interval.

**Usage**

```python
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
```

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.

```python
def __init__(
    self,
    *,
    years: int = 0,
    months: int = 0,
    weeks: int = 0,
    days: int = 0,
    hours: int = 0,
    minutes: int = 0,
    seconds: float = 0,
) -> None:
```