---
title: "The Timestamp method"
slug: "the-timestamp-method"
abstract: "Overview of the Timestamp method and properties."
---
# The Timestamp method

To define the timestamp, use the `Timestamp()` method.

| Property | Details |
| --- | --- |
| UT SDK methods | `Timestamp(DateTime)` |
| Required/optional | Optional |
| Multiple invocations | Multiple invocations are forbidden and cause an *InvalidOperationException* exception |
| Value validation | Must contain proper DateTime value<br><br>Cannot be null |