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🎂 Birthday Countdown Calculator

Enter your date of birth for a live countdown to your next birthday, your exact age, total days lived, and fun birthday facts. Share the countdown with a friend!

How Birthday Countdown Works

Age (years) = today.year − dob.year (−1 if birthday not yet passed)
Total days = (today − dob) / 86,400,000 ms
Next birthday = dob month/day in current year (or next year)
Countdown = nextBirthday − now (updated every second)

How to Use the Birthday Countdown

  1. 1
    Enter Your Date of Birth
    Use the date picker to select your exact date of birth.
  2. 2
    Add Your Name (Optional)
    Enter your name to personalise the results display.
  3. 3
    Click Calculate
    See your age details, total days lived, and a live countdown to your next birthday.
  4. 4
    Share the Countdown
    Copy the share link to send your birthday countdown to friends and family.
'What happens if today is my birthday?', 'answer' => 'If today matches your birth date, the calculator shows a special "Happy Birthday!" banner with a colourful confetti animation, and the countdown resets to count down to your next birthday (one year away).'], ['question' => 'Why do total minutes seem so large?', 'answer' => 'Minutes add up quickly — a 30-year-old has lived over 15.7 million minutes! This calculator computes approximate totals based on total days × 24 × 60. The number is a fascinating way to visualise the passage of time.'], ]" />

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