---
title: "timestampOf"
description: "Returns the timestamp of a qualified value."
---

# timestampOf

> Returns the timestamp of a qualified value.

**This function is used by Ignition's Expression language.**

## Description
## Syntax
`timestampOf(value)`

### Parameters

| Type | Parameter | Description |
|---|---|---|
| Object | `value` | The value for which you want to find the timestamp. |

### Results
**Date** - Returns the timestamp of the value's last update.

## Examples

```py title="Code Snippet"
timestampOf({[default]Sensor 1/Reading}) //Returns the timestamp of the tag's last value update
```

```py title="Code Snippet"
timestampOf(tag("[default]Sensor 1/Reading")) //Returns the timestamp of the tag's value at the time the expression was evaluated on the Gateway
```

```py title="Code Snippet"
// Using tag() with a string tagPath
timestampOf(tag("[default]Sensor 1/Reading")) //Example return: 2025-01-23 08:30:00 (evaluated at the Gateway)

// Using a bound value
timestampOf({[default]Sensor 1/Reading}) //Example return: 2025-01-23 08:30:02 (timestamp from the OPC source)
```

```py title="Code Snippet"
{[default]Sensor 1/Reading.timestamp} //Directly accesses the tag's timestamp property, returning the timestamp from the OPC source
```