Date & Time Tools
Calculate age, the difference between two dates, time-zone differences across the world, a precise stopwatch and countdown timer, and convert Gregorian to Hijri dates.
5 tools · Free · No sign-up required
Age Calculator
Use the age calculator to find your exact age in years, months and days from your date of birth. See the total days you have lived, the day of the week you were born and the time left to your next birthday.
OpenChinese Gender Predictor
Predict your baby's gender with the traditional Chinese gender calendar, based on the mother's age and the month of conception. A fun, just-for-entertainment tool with no medical or scientific accuracy.
OpenDate Calculator
Find the exact number of days, weeks, months and years between any two dates, or add and subtract days from a date. Leap years are handled automatically and every result appears instantly as you type.
OpenHijri Date Converter
Convert a Gregorian date to the Hijri (Islamic) calendar or a Hijri date back to Gregorian. See today's Hijri date and the dates of upcoming Islamic days like Ramadan, Eid al-Fitr and Eid al-Adha.
OpenTime Zone Converter
Find the time difference between any two cities and compare live local times and working hours across 170+ countries and 600+ cities. Daylight saving is handled automatically for accurate meeting planning.
OpenAbout Our Date & Time Tools
Date and time tools answer the everyday questions that calendars and clocks make surprisingly fiddly. How old am I exactly? How many days until a deadline? What time is it for a colleague abroad? This category gathers 5 free tools that handle dates, durations and time zones precisely, with leap years and daylight saving taken care of automatically.
Age and Date Difference
The age calculator gives your exact age in years, months and days, the total days you have lived and the time until your next birthday. The date calculator finds the precise span between any two dates or adds and subtracts days, with leap years handled automatically.
Time Zones and Scheduling
The time zone converter compares live local times and overlapping working hours across 170+ countries and 600+ cities, with daylight saving applied automatically — ideal for scheduling international meetings and coordinating across regions.
Calendar Conversion and Date Tools
The Hijri date converter turns a Gregorian date into the Islamic (Hijri) calendar and back, and shows today's Hijri date along with upcoming Islamic days such as Ramadan and Eid. The Chinese gender predictor uses the traditional Chinese calendar and the mother's age and conception month for a fun, date-based prediction.
2026 Date & Time Topics — Comparison
| Tool | What It Does | Typical Use Case |
|---|---|---|
| Age calculator | Exact age, days lived | Birthdays, forms, eligibility |
| Date calculator | Days between dates | Deadlines, leave, countdowns |
| Time zone converter | Live local times, overlap | International meetings, travel |
| Stopwatch / timer | Lap timing, countdown alarm | Workouts, cooking, study |
| Hijri converter | Gregorian ↔ Hijri | Islamic dates, Ramadan, Eid |
- Leap years and daylight saving are handled automatically for accurate results
- Time-zone data covers 170+ countries and 600+ cities
- Everything you enter is processed in your browser and never uploaded
- No sign-up required and every tool is free
- Works the same on phones, tablets and desktop
Choose any card on this page to open the tool and get your answer instantly.
Date & Time Tools — Frequently Asked Questions
Enter your date of birth and the tool calculates your exact age in years, months and days, the total days you have lived, the weekday you were born and the time left until your next birthday — leap years included.
Yes. It applies daylight saving automatically for each city, so the local times and overlapping working hours it shows are accurate when you schedule meetings across regions.
Yes. The Hijri date converter turns any Gregorian date into the Islamic calendar and back, and shows today's Hijri date plus upcoming Islamic occasions such as Ramadan and Eid.
Yes. All date and time calculations run in your browser. No dates or inputs are sent to or stored on our servers.
Yes, every tool is fully responsive and works on phones and tablets just like on desktop, with no app to install.
Yes, all of them are completely free with no registration or payment required.