๐ Date & Time
Free date and time tools: age calculator, duration, countdown, date difference, and more. In your browser.
Age from a birthday, days between dates, working days until a deadline, countdowns, week numbers, time zones โ date math is surprisingly tricky to do in your head, and surprisingly easy here. Every tool accounts for calendar rules like leap years automatically.
Results are computed in your browser from the dates you enter, using the proleptic Gregorian calendar rules that programming languages and spreadsheets follow. Nothing is sent anywhere, which also makes these tools safe for confidential dates.
Tools cover age and durations, working-day and holiday planning, countdowns to events, and date formatting or conversion.
๐๏ธ Date & Age Calculators
Age Calculator
Calculate your exact age in years, months, and days online for free. Perfect for
Business Day Calculator
Free online business day calculator. Add or subtract working days from any date,
Calendar Generator
Free online calendar generator. Create clean, printable monthly calendars for an
Date Calculator
Calculate days between two dates or add/subtract days from any date with our fre
Date Difference Calculator
Calculate the exact days, months, and years between two dates online for free. P
Day of Year Calculator
Free online day of year calculator. Find out what day of the year any date falls
Epoch Converter
Free online Unix epoch timestamp converter. Convert between Unix timestamps (sec
Germany Notice Period Calculator
German statutory notice period (BGB ยง622): 4 weeks for employees, 1-7 months for
TรV / HU Due Date Calculator
Calculate when your German TรV / HU inspection is due: first HU 36 months after
Julian Date Converter
Free online Julian date converter. Convert between Julian Day Number (JDN) and G
Portugal Postal Code Lookup
Look up Portuguese postal codes: CP7 format NNNN-NNN explained, 20 major CTT pre
Portugal Holidays Checker
Check every Portugal public holiday in 2026: 13 national dates, Lisbon, Porto, M
Spain Codigo Postal Lookup
Find any Spanish postal code (codigo postal) by province or city. Search Correos
Spain Festivos Checker
Check Spain's national and regional public holidays (festivos) for 2026. Find fi
UK Bank Holidays Checker
Free UK bank holidays checker for 2026 and 2027. View all public holidays for En
Week Number Calculator
Free online week number calculator. Find the ISO 8601 week number for any date,
๐ Time, Zones & World Clock
Countdown Timer
Count down the days, hours, and minutes to any event online for free. Perfect fo
Meeting Planner
Free online meeting planner. Compare times across multiple world time zones to f
Moon Phase Calculator
Free online moon phase calculator. Find the moon phase for any date past or futu
Time Zone Finder
Free online time zone finder. Search for any time zone, see UTC offsets, current
Timezone Converter
Free online timezone converter. Convert any date and time between different worl
World Clock
Free online world clock. See the current time in major cities around the world s
๐ Japanese Calendar & Traditions
Auspicious Days Finder
Find auspicious days (ๅๆฅ) in the Japanese calendar: Ichiryumanbaibi (ไธ็ฒไธๅๆฅ) and
Coming of Age Calculator
Find your Seijin no Hi (Coming of Age Day) year. Enter your birth year to see wh
Japan Era Converter
Convert any Japanese era year (ๅๆฆ) to a Western year and back: Meiji, Taisho, Sh
Japan Gengo Lookup
Look up Japan's era names (ๅ ๅท): Meiji, Taisho, Showa, Heisei, Reiwa - their star
Jusan Mairi Calculator
Find your Jusan Mairi (ๅไธๅใ) year. This Kyoto-rooted coming-of-age ritual celebr
Kanreki Calculator
Find out when your kanreki (้ๆฆ, 60th birthday) year is. This traditional Japanes
Kazoedoshi Calculator
Calculate your kazoedoshi (ๆฐใๅนด), the traditional Japanese counting age. Enter yo
Japanese Lunar Date Converter
Convert a Western date to the Japanese old lunar calendar (ๆงๆฆ) and see the moon
Japan Public Holiday Checker
List Japan's 16 public holidays (็ฅๆฅ) for any year, with dates, weekdays and subs
Japan Rokuyo Checker
Look up the Japanese ๅ ญๆ (rokuyล) for any date: ๅคงๅฎ, ่ตคๅฃ, ๅ ๅ, ๅๅผ, ๅ ่ฒ , ไปๆป . Based on
Setsubun & Eho Finder
Find the date of Setsubun (็ฏๅ) and the year's lucky direction (ๆตๆน, eho) for bean
Japan Shichi-Go-San Calculator
Work out the Shichi-Go-San (ไธไบไธ) ceremony year for a child from their birth year
Traditional Japanese Month Names
Learn all 12 traditional Japanese month names (ๅ้ขจๆๅ): Mutsuki, Kisaragi, Yayoi,
Japan Yakudoshi Checker
Check your yakudoshi (ๅๅนด) - the traditional Japanese unlucky ages - from your bi
Japan Zodiac Calculator
Find the Japanese zodiac animal and ๅนฒๆฏ (eto) for any year: Rat, Ox, Tiger and th
Frequently asked questions
Are these date and time tools free?
Yes โ free, no account, running entirely in your browser.
Do the calculators handle leap years correctly?
Yes. Leap-year rules, month lengths and year boundaries are handled by the same date engine browsers use internally.
Which calendar system is used?
The Gregorian calendar โ the standard for business and everyday planning worldwide. Some tools also explain related conventions like week numbering.
Can I calculate working days for my country?
Several tools compute business days with configurable weekend and holiday input, so you can adapt them to your local calendar.
Are my dates stored anywhere?
No. All computation is local; the dates you enter never leave your device.