How long until my birthday?
A birthday countdown finds the next occurrence of your birth month and day, then measures the remaining calendar time from today. The weekday can also be calculated directly from that next birthday date.
Use the calculator
The interactive tool calculates the personalised result from the values you enter and explains any approximation it uses.
What the number does — and does not — mean
EgoTools separates exact calendar calculations from estimates. Exact date tools use calendar arithmetic. Estimates state their assumptions explicitly, and entertainment tools are labelled as entertainment rather than disguised as scientific measurements.
Keep exploring
Your result is designed to lead naturally into another question about your age, birthday, time or money.