Unix Timestamp — DevKit

Current Unix Timestamp

Seconds 0

Milliseconds 0

Convert

Timestamp → Human date

UTC —

Local —

ISO —

Human date → Timestamp

:

Seconds —

Milliseconds —

Hex —

Get current Unix time in code

C# / .NET

// seconds

DateTimeOffset.UtcNow.ToUnixTimeSeconds()

// milliseconds

DateTimeOffset.UtcNow.ToUnixTimeMilliseconds()

// from timestamp

DateTimeOffset.FromUnixTimeSeconds(ts)

JavaScript / TypeScript

// seconds

Math.floor(Date.now() / 1000)

// milliseconds

Date.now()

// from timestamp

new Date(ts * 1000).toISOString()

Python

# seconds

import time; int(time.time())

# from timestamp

datetime.fromtimestamp(ts, tz=timezone.utc)

Go

// seconds

time.Now().Unix()

// from timestamp

time.Unix(ts, 0).UTC()

SQL (PostgreSQL / MySQL)

-- current

SELECT EXTRACT(EPOCH FROM NOW());

-- from timestamp

SELECT TO_TIMESTAMP(1716000000);

Shell / PowerShell

# bash

date +%s

# PowerShell

[DateTimeOffset]::UtcNow.ToUnixTimeSeconds()

Common durations in seconds

Duration	Seconds	Use case
1 minute	60	Short cache TTL
1 hour	3 600	Session timeout
1 day	86 400	Daily job, cookie expiry
1 week	604 800	JWT refresh token
30 days	2 592 000	Monthly subscription
1 year (365d)	31 536 000	Long-lived token, cert
10 years	315 360 000	Root CA certificate
Unix max (32-bit)	2 147 483 647	Year 2038 problem — Jan 19, 2038