---
type: "fhirpath-function"
title: "FHIRPath Function: dateOf"
function: "dateOf"
category: "Utility functions"
section: "5.10.8.9"
source: "fhirpath/functions.json"
---
# FHIRPath Function: dateOf
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## Summary
- **Category**: Utility functions
- **Section**: `5.10.8.9`
- **Return Type**: `Date`
- **Empty Input Result**: `empty`
- **Errors on Multiple Input**: `true`
## Description
If the input collection contains a single Date or DateTime, this function will return the date component (up to the precision present in the input value).
## Arguments
- none
## Type Mapping
- `Date-Date`
- `DateTime-Date`
## Example
```fhirpath
@2012-01-01T12:30:00.000-07:00.dateOf() // @2012-01-01
```