JavaScript dates
02 May, 2023
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The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds (in ISO 8601: 1970-01-01T00:00:00Z). Literally speaking the epoch is Unix time 0 (midnight 1/1/1970), but ‘epoch’ is often used as a synonym for Unix time.
| Human-readable time | Seconds | Milliseconds |
|---|---|---|
| 1 second | 1 | 1000 ms |
| 1 minute | 60 s | 60,000 ms |
| 1 hour | 3,600 s | 3,600,000 ms |
| 1 day | 86,400 s | 86,400,000 ms |
| 1 week | 604,800 s | 604,800,000 ms |
| 1 month | 2,629,746 s | 2,629,746,000 ms |
| 1 year | 31,556,952 s | 31,556,952,000 ms |
Get the current epoch time Jump to heading
The getTime() method returns the time in milliseconds.
Math.floor(new Date().getTime() / 1000.0) // 1676457318
Convert from epoch to human-readable date Jump to heading
const date = new Date(1676457318 * 1000) // Wed Feb 15 2023 10:35:18 GMT+0000 (Greenwich Mean Time)
Date methods Jump to heading
date.toDateString() // 'Wed Feb 15 2023'
date.toJSON() // '2023-02-15T10:35:18.000Z'
date.toUTCString() // 'Wed, 15 Feb 2023 10:35:18 GMT'
date.toLocaleString() // '2/15/2023, 10:35:18 AM'
date.toLocaleTimeString() // '10:35:18 AM'
date.getDate() // 15
date.getTime() // 1676457318000
date.getUTCDay() // 3
date.getMinutes() // 35
date.getHours() // 10
date.getMonth() // 1 - months are zero-indexed
date.getFullYear() // 2023
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