Premium Converters

Date and time calculators for every planning need — age, date difference, days-until, business-day calculator, time zone converter, world clock, time duration, and Hijri-Gregorian conversion. Whether you're planning a project deadline, calculating someone's exact age in years/months/days, or coordinating a meeting across multiple time zones — these tools give you precise answers instantly.

Built around the standard Gregorian and Hijri (Islamic lunar) calendars with full leap-year handling, business-day awareness, and DST-aware time-zone math. No external API calls — everything runs locally in your browser.

Hijri ↔ Gregorian

Bidirectional Islamic ↔ Western calendar conversion, accurate from 622 CE onwards.

DST-aware

Time zone calculations correctly handle daylight saving transitions for every IANA zone.

Business-day mode

Add/subtract working days while skipping weekends — perfect for project deadlines and SLAs.

Frequently Asked Questions

How does the age calculator handle leap years?

Exactly. It tracks the actual day-of-year and gives you age in years, months, and days down to the precise day count — leap years and varying month lengths handled correctly.

Can I calculate the date X business days from today?

Yes — the Add/Subtract Days calculator has a 'business days only' mode that skips Saturdays and Sundays automatically.

How accurate is the Hijri conversion?

It uses the tabular Islamic calendar (Umm al-Qura standard), accurate to ±1 day vs visible-moon-sighting locally. For exact ritual dates (Eid, Hajj), confirm with your local mosque or moon-sighting committee.

Are time-zone calculations DST-aware?

Yes. Tools use the browser's IANA time-zone database which knows the historical and future DST rules for every zone — so a March meeting between London and New York shows the correct hour shift.

Explore Other Categories

Browse 159 free, browser-based calculators across 9 more categories.

Islamic

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Zakat, Mahr, Qurbani, Faraiz inheritance, Salah times, Qibla direction, Hijri calendar, and Sehri/Iftar — all in one place.

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Financial

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Make smarter money decisions with financial calculators.

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Gold & Silver

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Price, purity, weight, and karat calculators for precious-metal buyers, sellers, and jewellers.

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Health

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Monitor your wellness metrics with reliable health tools.

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Unit

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Instantly switch between any unit of measurement.

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Math

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Solve everyday math problems with dedicated calculators.

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Construction

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Essential tools for property, land, and building work.

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Utility

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Handy utilities for developers, writers, and everyday use.

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Fun

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Shareable, lighthearted tools for curiosity and entertainment.

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Need something specific? Search all 159 tools →

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Premium Converters

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Date & Time Calculators & Converters

Plan ahead and track time with precision.

9 tools

Most Used

Most Popular in Date & Time

The 4 tools our users open most often in this category.

4 picks

Age Calculator

Calculate exact age in years, months, and days from any date of birth, plus total days lived, the day of the week you were born, and days until your next birthday.

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Date Difference Calculator

Find the exact difference between any two dates expressed in years, months, weeks, days, hours, and minutes — ideal for project timelines, contract terms, and genealogy.

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Working Days Calculator

Count business days between two dates, excluding Saturdays and Sundays, with customizable workweeks (Mon–Fri, Mon–Sat, or Sun–Thu) for HR leave tracking and T+3 settlement.

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Countdown Timer

Live countdown to any future date and time, ticking down in days, hours, minutes, and seconds — perfect for weddings, exam dates, product launches, Ramadan, and Eid.

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All Date & Time Tools

Browse all 9 calculators

Age Calculator

Calculate exact age in years, months, and days from any date of birth, plus total days lived, the day of the week you were born, and days until your next birthday.

Use tool

Date Difference Calculator

Find the exact difference between any two dates expressed in years, months, weeks, days, hours, and minutes — ideal for project timelines, contract terms, and genealogy.

Use tool

Working Days Calculator

Count business days between two dates, excluding Saturdays and Sundays, with customizable workweeks (Mon–Fri, Mon–Sat, or Sun–Thu) for HR leave tracking and T+3 settlement.

Use tool

Countdown Timer

Live countdown to any future date and time, ticking down in days, hours, minutes, and seconds — perfect for weddings, exam dates, product launches, Ramadan, and Eid.

Use tool

Add / Subtract Days Calculator

Add or subtract any number of days, weeks, months, or years from any starting date with automatic handling of leap years, month-end rollovers, and Net-30 invoice terms.

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Time Duration Calculator

Calculate elapsed time between two clock times in hours, minutes, total minutes, and decimal hours — with automatic overnight crossings for night shifts, payroll, and freelance billing.

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Time Zone Converter

Convert times across PKT, EST, GMT, IST, JST, GST, and any other world time zone with automatic Daylight Saving adjustments — ideal for scheduling international meetings.

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Pomodoro Timer

Focus timer with 25-min work sessions, 5-min breaks, and a long break every 4 cycles. Customizable durations + sound.

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World Clock & Meeting Planner

Side-by-side clocks for cities worldwide. Plan meetings across time zones with live work-hours indicators.

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About Date & Time

Date and time calculators for every planning need — age, date difference, days-until, business-day calculator, time zone converter, world clock, time duration, and Hijri-Gregorian conversion. Whether you're planning a project deadline, calculating someone's exact age in years/months/days, or coordinating a meeting across multiple time zones — these tools give you precise answers instantly.

Built around the standard Gregorian and Hijri (Islamic lunar) calendars with full leap-year handling, business-day awareness, and DST-aware time-zone math. No external API calls — everything runs locally in your browser.

Hijri ↔ Gregorian

Bidirectional Islamic ↔ Western calendar conversion, accurate from 622 CE onwards.

DST-aware

Time zone calculations correctly handle daylight saving transitions for every IANA zone.

Business-day mode

Add/subtract working days while skipping weekends — perfect for project deadlines and SLAs.

Frequently Asked Questions

How does the age calculator handle leap years?

Exactly. It tracks the actual day-of-year and gives you age in years, months, and days down to the precise day count — leap years and varying month lengths handled correctly.

Can I calculate the date X business days from today?

Yes — the Add/Subtract Days calculator has a 'business days only' mode that skips Saturdays and Sundays automatically.

How accurate is the Hijri conversion?

It uses the tabular Islamic calendar (Umm al-Qura standard), accurate to ±1 day vs visible-moon-sighting locally. For exact ritual dates (Eid, Hajj), confirm with your local mosque or moon-sighting committee.

Are time-zone calculations DST-aware?

Yes. Tools use the browser's IANA time-zone database which knows the historical and future DST rules for every zone — so a March meeting between London and New York shows the correct hour shift.