Time & Date Tools

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⏰ Time & Date Tools

Timestamp converter, timezone converter, cron parser, date calculator & countdown timer

🕐 Unix Timestamp ↔ Date Converter

Enter a timestamp or date above to convert.
Usage Guide

What it does

Converts between Unix timestamps (seconds/milliseconds since Jan 1 1970 UTC) and human-readable dates in multiple formats.

How to use

  • Enter a Unix timestamp (seconds or milliseconds) and click Convert →
  • Or enter a date string and click → Timestamp
  • Click Now to get the current timestamp

Sample Input / Output

Input:  1700000000

Output:
Unix (seconds):  1700000000
Unix (ms):       1700000000000
ISO 8601:        2023-11-14T22:13:20.000Z
RFC 2822:        Tue, 14 Nov 2023 22:13:20 GMT
Local:           11/14/2023, 2:13:20 PM PST
UTC:             Tue, 14 Nov 2023 22:13:20 UTC

Real-world use cases

  • Debugging API responses with epoch timestamps
  • Converting database timestamp columns to human-readable dates
  • Checking JWT token expiry times (exp field)
  • Comparing event logs across systems

🌍 Timezone Converter

Select a date/time and timezones to convert.
Usage Guide

What it does

Converts a date and time from one timezone to another using the browser’s built-in Intl.DateTimeFormat API.

How to use

  • Pick a date/time using the datetime picker
  • Select source and target timezones from the dropdowns
  • Click Convert Timezone
  • Show All Zones displays the time in every listed timezone

Sample Input / Output

Input:  2024-03-15 09:00 AM  (US/Eastern → Asia/Kolkata)

Output:
From: Fri, Mar 15, 2024, 9:00:00 AM EST (US/Eastern)
To:   Fri, Mar 15, 2024, 7:30:00 PM IST (Asia/Kolkata)
Offset difference: +10h 30m

Real-world use cases

  • Scheduling meetings across global teams
  • Converting deployment windows to local time
  • Coordinating on-call handoff times
  • Planning release schedules across regions

⚙️ Cron Expression Parser

Quick examples:
Enter a cron expression to parse.
Usage Guide

What it does

Parses standard 5-field cron expressions and shows a human-readable description plus the next 5 scheduled run times.

Cron field reference

┌───────────── minute (0-59)
│ ┌───────────── hour (0-23)
│ │ ┌───────────── day of month (1-31)
│ │ │ ┌───────────── month (1-12)
│ │ │ │ ┌───────────── day of week (0-6, Sun=0)
│ │ │ │ │
* * * * *

Supported syntax

  • * — any value
  • 5 — specific value
  • 1-5 — range
  • */15 — every 15 units
  • 1,15 — list of values
  • 1-5/2 — range with step

Sample Input / Output

Input:  */15 9-17 * * 1-5

Description: Every 15 minutes, from 9:00 AM to 5:59 PM,
             Monday through Friday

Next 5 runs:
  1. Mon, Jan 15, 2024, 9:00:00 AM
  2. Mon, Jan 15, 2024, 9:15:00 AM
  3. Mon, Jan 15, 2024, 9:30:00 AM
  4. Mon, Jan 15, 2024, 9:45:00 AM
  5. Mon, Jan 15, 2024, 10:00:00 AM

Real-world use cases

  • Verifying CI/CD pipeline schedules
  • Setting up cron jobs on Linux servers
  • Configuring Kubernetes CronJob resources
  • Debugging scheduled task timing issues

📅 Date Difference Calculator

Select two dates to calculate the difference.
Usage Guide

What it does

Calculates the precise difference between two dates and times, showing the result in multiple units including years, months, days, hours, minutes, seconds, total days, weeks, and business days.

How to use

  • Select a start date/time and an end date/time
  • Click Calculate Difference
  • From Today sets the start date to now — enter only the end date

Sample Input / Output

Start: 2024-01-01 00:00:00
End:   2024-12-31 23:59:59

Difference:
  11 months, 30 days, 23 hours, 59 minutes, 59 seconds

Total:
  365 days  |  52 weeks 1 day
  8,783 hours  |  527,039 minutes
  261 business days (Mon-Fri)

Real-world use cases

  • Calculating project duration for sprint planning
  • Figuring out SLA compliance windows
  • Computing age or time-since-event
  • Estimating business days for delivery timelines

⏳ Countdown / Elapsed Timer

Set a target date to start the countdown.
Usage Guide

What it does

Shows a live countdown to a future date or elapsed time since a past date, updating every second.

How to use

  • Pick a target date/time using the datetime picker
  • Click Start Countdown — the display updates in real time
  • If the target is in the past, it shows elapsed time instead
  • Use preset buttons for quick targets

Sample Output

⏳ Countdown to: Sat, Jan 01, 2025, 12:00:00 AM

  142 days  03 hours  27 minutes  15 seconds

Progress: ████████████░░░░░░░░ 61.4%
(based on 365-day year)

Real-world use cases

  • Tracking time until a product launch or release
  • Monitoring time remaining in a sprint
  • Counting down to certificate or license expiry
  • Calculating how long a server has been running (uptime)