---
title: "dateIsDaylight"
description: "Checks to see if the current timezone is using daylight savings time during the date specified."
---

# dateIsDaylight

> Checks to see if the current timezone is using daylight savings time during the date specified.

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

## Description

Checks to see if the current timezone is using daylight savings time during the date specified. Will use the current date if no date is specified.

## Syntax

`dateIsDaylight([date])`

### Parameters

| Type | Parameter | Description                                                                    |
|------|-----------|--------------------------------------------------------------------------------|
| Date | `date`    | The date to use for the check. If omitted, the current date will be used. [optional] |

### Returns

**Boolean** - Returns true if the current time zone is using Daylight Saving Time during the specified date, or false otherwise.

## Examples

```python title="Code Snippet"
dateIsDaylight(toDate("2007-06-28 00:00:00")) // Will return True in the US/Pacific Timezone, due to that time zone's observation of Daylight Saving Time on the specified date.
```