> For the complete documentation index, see [llms.txt](https://help.openloyalty.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.openloyalty.io/main-features/expressions/sample-use-cases/set-custom-time.md).

# Set Custom Time

You can use the `setTime()` method in expressions to manipulate the **time portion** of a `DateTime` object while keeping the **date unchanged**. This is useful when you need to compare datetimes, align time boundaries (e.g., end of day), or create consistent evaluation logic in rules.

***

#### 📌 Syntax

```plaintext
(datetime).setTime(hour, minute, second)
```

* `datetime` – a valid DateTime object (e.g. `event.eventDate`, `member.createdAt`, `executionContext.processedAt` etc.)
* `hour` – an integer between 0 and 23
* `minute` – an integer between 0 and 59
* `second` – an integer between 0 and 59

***

#### ✅ Example Use Case

**Set the point expiry on the same day as when the transaction was placed**

```plaintext
(transaction.purchasedAt).setTime(23, 59, 59)
```

You can create a dynamic configuration for the expiration or pending periods in your campaigns:

<figure><img src="/files/sganHAfeRoY4frRfYOoF" alt=""><figcaption></figcaption></figure>

***

#### 🧪 Tip

You can combine it with helper methods like `add_days_to_date`, `add_months_to_date`, or `add_years_to_date` to build more dynamic expressions.


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