Calculate your exact age
Exact age
25 years, 0 months, 0 weeks, 0 days
Age progress to next birthday
Next birthday
Date: Friday, July 31, 2026
Countdown: —
Weekday: Friday
Birth insights
Date & time toolkit
More instant calculators — no signup, no server round-trips.
Date Difference
Days, weeks, months & business days between dates
Add / Subtract Dates
Add or subtract days, weeks, months, years, hours & minutes
Time Calculator
Time differences and future/past dates
Countdown
Birthday, anniversary & custom event timers
Leap Year Checker
Check if any year is a leap year
Day of Week
Find the weekday for any date
Week Number
ISO week number of any date
Calendar Viewer
Browse months and highlight dates
Timestamp Converter
Unix timestamps to human dates
Date Formatter
Format dates in popular styles
From the blog
Guides on age, dates, leap years, and more.
Tutorials
Timestamp Converter Guide
Convert Unix timestamps to readable dates and back — understand epochs, timezones, and common developer pitfalls.
4 min read
Reference
How Leap Years Work
A practical explanation of leap year mechanics — orbital drift, calendar rules, and their impact on dates and age calculations.
4 min read
Tutorials
How To Find Day Of Birth
Discover what day of the week you were born on using Zeller's congruence, perpetual calendars, and online date tools.
4 min read