# Get the weekday of a date

Look up the English weekday name of a date.

Canonical: https://1loc.dev/date-time/get-the-weekday-of-a-date/
Version: 1.0.0
Runtime: JavaScript · Node.js 22 / modern browsers
Verification: Local fixtures; no external services
Updated: 2026-10-28

## Implementation

```javascript
function weekday(date) { return ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'][new Date(date).getUTCDay()]; }
```

## Input

```json
"2026-10-28"
```

## Expected output

```json
"Wednesday"
```

## Edge case

Input:
```json
"2026-11-01"
```
Output:
```json
"Sunday"
```

## Limits

- English only; Intl.DateTimeFormat with { weekday: "long" } localizes it.

The lab validates types and size before calling this function. Add equivalent validation at your own trust boundary.

## Source and license

Original: https://github.com/phuocng/1loc/blob/14b481cf60dff1620ab1bb99a43b1f68068cdd9b/contents/get-the-weekday-of-a-date.mdx
Author: Nguyen Huu Phuoc and original contributors
Contributors: See original repository history
Source commit: 14b481cf60dff1620ab1bb99a43b1f68068cdd9b
Copyright (c) 2020 phuoc-ng
License: MIT — https://1loc.dev/licenses/
Maintainer: Oveyon
Modifications: Reads the UTC weekday. Original MDX retained as inert source evidence.