Half Birthday Calculator

Find your half birthday, countdown to the next one, upcoming schedule, days lived, and fun facts.

How It Works

  1. Enter your birthday. Use the date picker to set your birth date.
  2. Get your half birthday. We add 6 months to find the mid-year celebration date.
  3. Countdown. See days and weeks until your next half birthday.
  4. Upcoming schedule. View the next several half birthdays with approximate ages.
  5. Days lived & fun facts. Total days alive, season, zodiac, and day of week.

Also try our Sleep Calculator or Date & Time Calculators.

Enter values to see results.

Formula & Reference

Half birthday = birth date + 6 months