Date Difference Calculator | Days Between Dates
Calculate the exact number of days, weeks, months, or years between any two dates. Includes business days toggle, holiday countdowns, and live countdown timers.
How It's Calculated
Popular Countdowns
Days left until major global and cultural holidays.
No holidays found for this region in the current list.
Our **Smart Date Calculator** is a unified studio for measuring time. Whether you need to find how many days have passed since a historic event (Days Since) or how many weeks are left until a deadline (Days Until), this tool provides high-precision results including standard and business day calculations.
How to Use
- Choose your mode: "Days Since" for past dates or "Days Until" for future milestones.
- Select your Start and End dates using the calendar pickers.
- Toggle "Business Days Only" if you want to exclude weekends from the count.
- View the rich breakdown across days, weeks, months, and even minutes/seconds.
- Check the "Popular Events" grid for one-click countdowns to major holidays.
Features
- NLP Power Search: Type "days until next Christmas" or "days since birth".
- Business Day Toggle: Accurate counts for work and professional planning.
- Multi-Unit Decomposition: See results in days, weeks, months, years, and more.
- Live Countdown: Ticking timers for upcoming future events.
- History Tape: Locally stored recent calculations for quick reference.
- Holiday Grid: Dedicated countdown cards for Christmas, Halloween, and New Year.
Common Use Cases
- Project Management: Calculating business days for sprint planning.
- Personal Milestones: Tracking days since a life-changing event or habit.
- Event Planning: Managing countdowns for weddings, birthdays, and holidays.
- Legal & HR: Calculating contract durations and notice periods.
- Financial: Measuring elapsed time for interest or billing cycles.
Tips & Best Practices
Enable "Business Days" when planning work projects to get more realistic deadlines.
Type your query in natural language in the Power Search for the fastest results.
Save common countdowns (like "Vacation") to your history for instant access later.
The "Days Until" mode is perfect for setting as a home-screen bookmark for urgent events.
Common Questions
Does this calculator account for leap years?
Yes, our engine fully accounts for the 366th day in leap years for both past and future calculations.
How are business days calculated?
Business days are calculated by starting from the initial date and counting only Monday through Friday, skipping all Saturdays and Sundays.
What is the "Power Search"?
Power Search allows you to type your query in plain English, like "days until election" or "days since graduation", and get an instant result.
