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📅 Date & Age Calculator

Calculate Any Date

Age calculator, days between dates, business days, countdown timers, and date arithmetic — all in one place.

🎂

Age Calculator

Date of Birth
Age on this date (default: today)
—Years
—Months
—Days
📆

Days Between Dates

Start Date
End Date
—Days
—Weeks
—Months
⏳

Countdown Timer

Target Date
Event Name (optional)
Days Until Event —
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Business Days Between Dates

Start Date
End Date
—Business Days
—Total Days
—Weekend Days
➕

Add or Subtract Days

Starting Date
Number of Days
Operation
Result Date —

How to Calculate Your Exact Age

Your exact age in years, months, and days is calculated by finding the difference between your birthdate and today. It's not just dividing total days by 365 — months have different lengths, and leap years add complexity.

What Are Business Days?

Business days exclude weekends (Saturday and Sunday) and typically also exclude public holidays. Our calculator excludes weekends but not holidays, since holidays vary by country, state, and company policy.

Why Countdown Dates Matter

Whether you're planning a wedding, tracking a project deadline, or counting down to a vacation — knowing the exact number of days creates a concrete, actionable goal. Studies show people with countdowns are more likely to complete preparations on time.

Adding Days to a Date

Adding days to a date is trickier than it seems because months have different lengths. Adding 30 days to January 15 lands on February 14, not February 15. Our calculator handles all edge cases including leap years and month-end dates.