Age and a guide to filings
From your date of birth, see typical windows for passports, visas, contracts, and other applications — including the days before and after. Recheck what the birthday itself actually marks.
Completed age as of today — a quick check before you open the given-date tab.
Completed age on an application, inspection, year-end, or posting date — the figure the form wants.
Weekday, ISO week, Japanese era, Western zodiac, the Chinese-zodiac animal, and the next birthday.
The birthday month and the months before and after it, with weekdays, weekends, and the main public holidays of the country you pick — a guide for when a counter might be open.
Crowding over these three months
A guide from leisure-season patterns and public holidays — not measured queue times.
The span between two people, two events, or two contracts.
Estimate a date of birth from an age, or name the calendar day when a birth date turns N years.
From an age
Date when it turns N years
Anniversary timeline
Enter a start date above to see the anniversary timeline.
Days to the next anniversary will appear here.
Tips
The Age That Goes on the Form
A passport, visa, contract, or inspection asks for completed age on that day — not a rounded year. Type the start date and the filing date; the years, months, and days are already there.
Leap Years Count Too
Completed age is not years times 365. Some years include a February 29 and some do not. Skip that and the age on a visa or inspection date slowly goes wrong. Real age follows the calendar, leap days included.
Names That Sit on a Date
Weekday, ISO week, Japanese era, Western zodiac, and the Chinese-zodiac animal — the same kind of field a form already prints.
Crowding Is Only a Guide
The three-month window includes a crowding sketch from leisure-season patterns and public holidays. It is not measured queue times. Opening hours still come from the form.
Common Use Cases
Passport and Visa Filing Day
Completed age on the day you lodge the application — the figure the form wants, not the age you say in conversation.
Contract and Inspection Date
A lease, a medical exam, or a workplace checkup often keys off age on that calendar day. Set the filing date and read the completed years.
Year-End and Secondment Day
Year-end close (31 December) or a tax-year date — 15 April in the US, 5 April in the UK — is just another filing date.
A Window Around the Birthday
The birthday month and the months on either side, with weekends and the main public holidays of the country you pick. A guide for when a counter might be open — not a booking.
The Gap Between Two Dates
The exact span between two people, two events, or two contracts, in years, months, and days — not "about four years apart."