Date to Milliseconds Converter - UNIX Timestamp

Convert any date and time to milliseconds (a UNIX timestamp) online for free with this date to milliseconds converter. The tool transforms human-readable date and time values into milliseconds since 1 January 1970 (the UNIX epoch) — perfect for developers, data analysts, and anyone working with epoch time in applications, databases, or APIs. Select a date and time and get the millisecond value instantly.

Epoch milliseconds are the lingua franca of timestamps — timezone-free, sortable, and unambiguous — which makes them ideal for storing and comparing moments across systems. To reverse the conversion, use the Milliseconds to Date tool, or check the live clock on the Current Date and Time page.

Current Date and Time - Live Online Clock

Get the current date and time instantly with this free live online clock. See the exact time in your local timezone and in UTC, the day of the week, and the real-time UNIX timestamp in milliseconds — all updating every second. Perfect for developers, system administrators, and anyone who needs an accurate, always-current world clock with no setup required.

Whether you are debugging a timezone bug, synchronising logs across regions, or simply need today's date in ISO format, this live clock shows every representation you are likely to need at once: local time, UTC, the day of the week, and the epoch millisecond value that databases and APIs use internally. To turn a specific timestamp into a readable date, use the Milliseconds to Date converter.

Current Date and Time (UTC & Local)

UTC Date & Time
Local (24-Hour)
Local (12-Hour)
UNIX Time (ms)

Live Timestamp Formatting Examples

Different backend frameworks, API gateways, and cloud databases require distinct standard date encodings. Here are the most widely used representations of the current moment:

// ISO 8601 / RFC 3339 (UTC standard)
2026-10-25T14:48:00.000Z
// RFC 2822 (Email & HTTP Headers)
Sun, 25 Oct 2026 14:48:00 GMT
// UNIX Epoch (Seconds - 10 Digits)
1792942080
// UNIX Epoch (Milliseconds - 13 Digits)
1792942080000

How to Use the Live Clock

  1. Open the Page: The current date and time load automatically — no input needed.
  2. Read Local and UTC Time: Compare your local time (in 12- and 24-hour formats) with Coordinated Universal Time (UTC).
  3. Copy the UNIX Timestamp: Click the copy button next to the UNIX time value to copy the current timestamp in milliseconds.

Standard Timestamp Formats Compared

Choosing the appropriate timestamp format depends on your storage layer and whether timezone preservation is necessary:

Format NameExample OutputResolutionStandard Use Case
ISO 8601 / RFC 33392026-10-25T14:48:00.000ZMillisecondsJSON REST APIs, MongoDB, PostgreSQL TIMESTAMPTZ
UNIX Milliseconds17929420800001 millisecondJavaScript Date.now(), Redis caches, Kafka timestamps
UNIX Seconds (POSIX)17929420801 secondJWT claims (iat, exp), Linux file systems, Python time.time()
RFC 2822Sun, 25 Oct 2026 14:48:00 GMT1 secondHTTP Date & Expires headers, SMTP email headers

How to Get Current Timestamps in Code

Retrieve the current UTC date, local time, and epoch timestamp across standard programming environments:

JavaScript / TypeScript

// Current epoch milliseconds
const ms = Date.now();

// ISO 8601 string in UTC
const iso = new Date().toISOString();

// Epoch seconds (integer)
const sec = Math.floor(Date.now() / 1000);

Python 3

import time
from datetime import datetime, timezone

# Epoch seconds (float) and milliseconds
sec = int(time.time())
ms = int(time.time() * 1000)

# ISO 8601 in UTC
iso = datetime.now(timezone.utc).isoformat()

Go (Golang)

package main
import (
    "fmt"
    "time"
)

func main() {
    now := time.Now().UTC()
    sec := now.Unix()
    ms := now.UnixMilli()
    iso := now.Format(time.RFC3339)
}

SQL (PostgreSQL & MySQL)

-- PostgreSQL
SELECT CURRENT_TIMESTAMP;
SELECT EXTRACT(EPOCH FROM NOW())::BIGINT;

-- MySQL
SELECT NOW();
SELECT UNIX_TIMESTAMP();

Key Features

  • ✅ Real-time updates every second with zero browser lag
  • ✅ Local time in both 12-hour and 24-hour formats
  • ✅ UTC date, time, and day of the week reference
  • ✅ Live UNIX timestamp in milliseconds with one-click clipboard copy
  • ✅ Visual confirmation when timestamp copying pauses live ticks
  • ✅ Fully responsive design engineered for mobile, tablet, and desktop

Common Use Cases

  • Development & Debugging: Capture live UNIX timestamps for application logs, API calls, and time-based condition checks.
  • Database & APIs: Generate accurate epoch timestamps for record creation, cache invalidation, and expiration timestamps.
  • Timezone Comparison: Instantly compare your local time against UTC for global team coordination and server scheduling.
  • Quick Reference: Check the current date, time, and weekday at a glance without opening complex operating system menus.

About UNIX Time, Timezones, and the Y2038 Problem

A UNIX timestamp (also called epoch or POSIX time) counts the number of seconds — or milliseconds — that have elapsed since midnight on 1 January 1970 UTC, the so-called UNIX epoch. Because it is a single monotonic number with no timezone attached, it is the most reliable way to store and compare moments in time across systems, databases, and APIs. JavaScript's Date object works in milliseconds since the epoch, which is why this clock displays the value in milliseconds.

The same instant reads differently depending on where you are. UTC (Coordinated Universal Time) is the global baseline — it never observes daylight saving — while your local time applies your region's offset and DST rules. A timestamp of 1690000000000 ms is one exact moment, but it may show as 14:26 UTC and 19:56 in Kolkata on the clock at the same instant. Always store and transmit timestamps in UTC or as epoch milliseconds, and convert to local time only for display.

Two classic pitfalls catch developers out. First, the seconds-vs-milliseconds confusion: many APIs return seconds (10 digits), while JavaScript uses milliseconds (13 digits) — multiply or divide by 1000 to convert. Second, the Year 2038 problem: older 32-bit systems store seconds as a signed 32-bit integer that overflows in January 2038; 64-bit and millisecond-based systems are unaffected. To convert a specific moment, use the Date to Milliseconds tool, or reverse the process with Milliseconds to Date.

Common Errors and How to Fix Them

  • Timestamp 1000x off: You are mixing seconds and milliseconds. JavaScript uses milliseconds; many backend APIs use seconds — multiply or divide by 1000.
  • Wrong time after storing in database: Store epoch milliseconds or an ISO-8601 UTC string (such as 2026-10-25T14:48:00.000Z), not a localized string, to avoid timezone shifts.
  • Date shows "Invalid Date": The input string was out of range or in an unsupported regional format. Always pass standard ISO-8601 strings or numeric epoch integers.
  • Clock not updating: The widget runs on a browser background timer. Refresh the page if it stalls, or ensure JavaScript execution is not blocked by extensions.

Live Example

A chosen moment maps to one epoch value. The result is timezone-independent; the same instant always yields the same milliseconds:

Input (date/time)

22 July 2023, 08:26:40 UTC

Output (epoch ms)

1690000000000  (milliseconds since epoch)

How to Use Date & Time to Milliseconds Converter

  1. Select Date: Choose the date you want to convert using the date picker.
  2. Set Time (Optional): Add hours, minutes, and seconds for precise conversion.
  3. Get Result: The milliseconds value is instantly displayed in the output area.

Key Features

  • Instant Conversion: Convert date and time to milliseconds in real-time as you select values.
  • Live Timestamp Display: See current UTC and local time, plus live UNIX timestamp.
  • Easy Copy: One-click copy buttons for both converted value and current UNIX time.
  • Flexible Input: Choose any date and optionally add hours, minutes, and seconds.
  • Multiple Formats: View current time in both 12-hour and 24-hour formats.

Common Use Cases

  • API Development: Generate timestamps for API requests and database records.
  • Data Analysis: Convert human-readable dates to timestamps for data processing.
  • Programming: Create precise timestamps for logging and debugging.
  • Testing: Generate specific timestamps for testing time-sensitive features.
  • Timezone Conversion: Understand how dates translate to UNIX timestamps across timezones.

Benefits of Using Our Converter

  • ✅ Free to use with no registration required
  • ✅ Instant real-time conversion
  • ✅ Live display of current timestamps
  • ✅ Works on all devices - desktop and mobile
  • ✅ No data storage - your privacy is protected

About Converting Dates to Epoch

Storing a moment as epoch milliseconds — the count of milliseconds since midnight UTC on 1 January 1970 — removes all timezone ambiguity. A human-readable date like "22 July 2023, 08:26 UTC" depends on context, but the single number 1690000000000 pins one exact instant that every system interprets identically. That is why databases, logs, and APIs favour epoch values: they sort naturally, compare with simple arithmetic, and never suffer DST or offset confusion.

When you pick a date and time in this tool, it is interpreted in your local timezone and converted to the equivalent UTC epoch milliseconds. Be deliberate about timezone: a "3 PM" in New York is a different instant from "3 PM" in London. For server-side work, always store and transmit UTC (or epoch), and convert to local only at the presentation layer. To decode a timestamp back to a readable date, use the Milliseconds to Date converter.

Common Errors and How to Fix Them

  • Timestamp off by hours: A timezone mismatch between the picker's local interpretation and the target system. Confirm which timezone the value should represent.
  • Value 1000x too big or small: Some systems use seconds (10 digits), others milliseconds (13 digits). JavaScript and Java operate in milliseconds by default.
  • Pre-1970 dates: They produce negative epoch values, which are valid in modern 64-bit systems but must be supported by the consuming database or parser.
  • Daylight Saving Time (DST) ambiguity: During autumnal clock rollbacks, the same local clock time occurs twice. Always use UTC epoch milliseconds for uncompromised ordering.

How to Convert Date to Milliseconds in Code

Converting dates and timestamps to epoch milliseconds is a standard task in software development. Below are idiomatic code snippets in the most popular languages:

JavaScript / TypeScript

// Current timestamp in milliseconds
const nowMs = Date.now();

// From specific date string (ISO 8601)
const ms = new Date('2024-05-15T10:30:00Z').getTime();
console.log(ms); // Output: 1715769000000

Python 3

from datetime import datetime, timezone

# From specific datetime to milliseconds
dt = datetime(2024, 5, 15, 10, 30, tzinfo=timezone.utc)
epoch_ms = int(dt.timestamp() * 1000)
print(epoch_ms) # Output: 1715769000000

Java 8+ (java.time)

import java.time.Instant;

// Instant to epoch milliseconds
long epochMilli = Instant.parse("2024-05-15T10:30:00Z").toEpochMilli();
System.out.println(epochMilli); // 1715769000000

Go (Golang)

package main
import ("fmt"; "time")

func main() {
    t, _ := time.Parse(time.RFC3339, "2024-05-15T10:30:00Z")
    fmt.Println(t.UnixMilli()) // 1715769000000
}

Epoch Milliseconds Milestone Reference Table

Quickly verify common benchmark dates and their exact millisecond UNIX timestamp values:

Milestone Date (UTC)Epoch MillisecondsSignificance
1970-01-01 00:00:00.0000UNIX Epoch origin baseline
2000-01-01 00:00:00.000946684800000Turn of the millennium (Y2K)
2001-09-09 01:46:40.0001000000000000One billion seconds / 1 trillion ms
2024-01-01 00:00:00.0001704067200000Modern baseline 13-digit timestamp
2038-01-19 03:14:07.0002147483647000Max 32-bit signed Unix integer (Y2038)

Database Timestamp Storage: Epoch Milliseconds vs. ISO 8601 vs. TIMESTAMPTZ

When designing high-throughput databases and distributed telemetry schemas, selecting the optimal timestamp representation is critical for index performance and disk consumption:

Storage SchemaData Type (PostgreSQL / MySQL)Disk FootprintB-Tree Indexing SpeedEngineering Trade-offs
Epoch Milliseconds (Integer)BIGINT / INT88 bytesFastest (Direct numeric CPU registers)Optimal for high-frequency logs and metrics; requires application-side date formatting
SQL Native Timestamp (with TZ)TIMESTAMPTZ / TIMESTAMP(3)8 bytesHigh (Native DB optimization)Standard choice for relational records; supports rich SQL date intervals and grouping functions
ISO 8601 String RepresentationVARCHAR(24) / TEXT24 – 32 bytesSlowest (Byte-by-byte lexicographical scan)High disk overhead; susceptible to collation bugs and formatting variances

Frequently Asked Questions

1What is a UNIX timestamp?

A UNIX timestamp represents the number of milliseconds that have elapsed since January 1, 1970 (UTC), also known as the Unix epoch.

2Why convert dates to milliseconds?

Converting dates to milliseconds is essential for programming, database operations, API development, and working with time-based calculations.

3Does this tool support time zones?

Yes, the tool displays both UTC and local time, and converts based on your selected date and time values.

4How do I convert a date to milliseconds?

Pick your date and optional time using the selectors, and the milliseconds (UNIX timestamp) value appears instantly with a one-click copy button.

5Can I include hours, minutes, and seconds?

Yes, you can add hours, minutes, and seconds for precise conversions, or leave them blank to default to midnight.

6Is my date information private?

Yes, all conversions run locally in your browser, so your selected dates are never sent to a server.

7What is the Year 2038 problem and how does it affect timestamps?

The Year 2038 problem affects systems that store UNIX timestamps as 32-bit signed integers, which overflow on January 19, 2038 at 03:14:07 UTC. Modern 64-bit systems and 13-digit millisecond timestamps avoid this overflow completely.

8Why do databases store timestamps as BIGINT milliseconds?

Storing epoch timestamps as 64-bit integers (BIGINT) provides fixed 8-byte disk footprint, rapid B-tree indexing on CPU numeric registers, and eliminates cross-server timezone parsing ambiguities.