# Date.start_of_day

## Function

Returns a new Date object at zero o'clock on the current day.

## Syntax

```bt
date_value.start_of_day()
```

## Parameters

None.

## Return value

| Type | Description |
| ------ | ------ |
| Date | A new Date object at 00:00:00 today. |

## Code Example

```bt
result = date('2026-01-01 10:11:12').start_of_day().to_string()

// Output: 2026-01-01 00:00:00
print result
```

## Notes

- The original Date object is not modified.