Explore our complete suite of free mathematical date, age, and duration utilities.
Calculate exact age in years, months, days, hours, and seconds, with day born and milestone breakdowns.
Find days until your next birthday, half birthday dates, and upcoming birthday days of the week.
Determine total days, weeks, months, and years between any two dates, with option to include end day.
Check if any given year is a leap year based on Gregorian solar orbit mathematical rules.
Calculate elapsed hours and minutes between start and end times, including overnight shifts.
Count working business days between dates while excluding weekends and custom holidays.