## Syntax
```mermaid
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flowchart LR
Start((START)) --> DAY[DAY]:::quoted
DAY --> End((END))
```
## Purpose
The `DAY` SQL function collects the day number within a month from a date.
See also [[HOUR]], [[MICROSECOND]], [[MILLISECOND]], [[MINUTE]], [[MONTH]], [[SECOND]] and [[YEAR]].
Parameters:
- Input (`datetime`): the date/time.
Returns: the day as `int32`.
## Examples
The following example retrieves the day number within a month of a date:
```sql
select day(to_date('20260603', 'YYYYMMDD'))
-------------------
3
```
The following example retrieves the day number within a month of a date:
```sql
select day(to_date('20260531', 'YYYYMMDD'))
-------------------
31
```