What this tool does
The Next Birthday Countdown tells you precisely how long until your next birthday. Enter your date of birth and it shows the days remaining, a weeks-and-days breakdown, the age you’ll turn, and the weekday that birthday falls on — all computed live from today’s date.
How it works
The tool finds the next occurrence of your birth day-and-month on or after today, then counts the whole days between. If today is your birthday it celebrates with you; otherwise it rolls the target forward automatically. Leap-day birthdays (29 February) fold to 28 February in common years so the count always makes sense.
Free vs Pro
The free countdown handles one birthday and stores nothing. A proposed Pro upgrade would let you save birthdays for friends, family, and colleagues and send email, push, or calendar reminders ahead of each one — while the single-shot countdown stays free forever.
Privacy
Everything runs locally in your browser. Your date of birth is never uploaded, logged, or stored.