Calculate exact age from a date of birth, with a countdown to the next birthday.
Live Unix timestamp with bidirectional conversion, multi-timezone and multi-format output
Open →Find the difference between two dates, add or subtract time, and count workdays.
Open →Compare local times across time zones with automatic DST handling, handy for scheduling meetings across regions.
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Age Calculator computes exact age from a date of birth and an "age at" date (today or custom), plus totals in months/weeks/days, and the next birthday’s date, weekday, and countdown.
The convention used here is: in a non-leap year, a Feb 29 birthday falls on Feb 28. If the next birthday happens to land in a leap year, it correctly returns to Feb 29 with no unnecessary adjustment.
No. Since only dates (no time-of-day) are provided, every total is derived consistently from the calendar-day difference (e.g. days × 24 for hours) — never borrowed from the live clock to fake extra precision.
No — that shows a clear validation error asking you to enter a sensible date.
