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Count days between dates, track important events, milestones, and countdowns. Save unlimited events with progress tracking and reminders.
Friday, February 13, 2026 at 06:19:10 AM
Select start and end dates to begin counting
Calculate exact days between any two dates with 100% accuracy. Accounts for leap years and all calendar variations.
Save unlimited events with custom names, categories, and notes. Track birthdays, anniversaries, and special occasions.
Visual progress bar shows percentage complete. See days passed vs remaining at a glance.
Automatically identifies significant milestones like 100 days, 1 year, 1000 days, 5 years, and 10 years.
View duration in days, weeks, months, and years. Get complete breakdown of time periods.
Export all saved events as JSON file for backup or transfer to another device.
Day counting calculates the number of days between two dates by finding the difference in time and converting it to days. Our calculator accounts for all calendar complexities including leap years (366 days), varying month lengths (28-31 days), and date transitions. The calculation is precise to the day level.
When counting days, you can choose whether to include the end date in your calculation:
Example: January 1 to January 5
Most people prefer including the end date for event countdowns.
Our calculator automatically handles leap years, which occur every 4 years (with exceptions for century years). Leap years have 366 days instead of 365, with February having 29 days instead of 28.
Leap Year Rules:
The calculator shows your duration in multiple time units for better understanding:
Conversion Reference:
Certain day counts have special significance in various cultures and contexts. Our milestone tracker highlights these important markers: 100 days (common celebration in relationships), 365 days (1 year anniversary), 1000 days (significant long-term milestone), 1825 days (5 years), 3650 days (10 years), and beyond. These milestones help you celebrate progress and mark important achievements.
The progress percentage shows how much of your time period has elapsed. It's calculated as: (Days Passed ÷ Total Days) × 100. For example, if 75 days have passed out of 100 total days, the progress is 75%. This visual representation helps you understand at a glance how far along you are in any time period.
Organize your events by category (Birthday, Anniversary, Work, Vacation, Special) to quickly identify and filter different types of countdowns. Color coding helps visual recognition.
Use the notes field to add context like gift ideas for birthdays, travel plans for vacations, or project details for work deadlines. Future you will thank present you!
Export your saved events regularly using the Export button. This creates a backup in case you clear browser data or switch devices. The JSON file can be saved to cloud storage.
Use the Milestone tab to see upcoming significant day counts. Plan celebrations or check-ins for 100 days, 1 year, or other meaningful markers in your journey.
Don't limit yourself to one event! Save multiple countdowns to track various goals, events, and milestones simultaneously. Perfect for busy schedules and multiple projects.
The progress bar and percentage give you motivation. Check regularly to see how far you've come and stay motivated for long-term goals and projects.
Enter your start date and end date in the calculator. It will automatically calculate the total days between the dates, including days passed, days remaining, and show progress as a percentage. You can choose to include or exclude the end date in the calculation.
Yes! After calculating days, you can save events with custom names, categories (Birthday, Anniversary, Work, Vacation, Special), and notes. All saved events are stored locally and show countdown timers with days remaining.
The milestone tracker automatically identifies significant day milestones like 100 days, 1 year (365 days), 500 days, 1000 days, 5 years, and 10 years. It shows which milestones have passed and how many days until upcoming milestones.
You can choose! There's a checkbox option to include or exclude the end date in your calculation. Including the end date adds one extra day to the total count.
Yes! Click the Export button in the Saved Events tab to download all your events as a JSON file. This allows you to backup your data or transfer it to another device.
The day counter is 100% accurate and accounts for all calendar variations including leap years, different month lengths, and date transitions. It uses JavaScript's built-in Date object for precise calculations.
Use it for tracking birthdays, anniversaries, project deadlines, vacation countdowns, pregnancy due dates, retirement planning, relationship milestones, event planning, goal tracking, and any important date you want to monitor.
Yes! The calculator shows the duration in multiple formats: total days, weeks (passed and remaining), approximate months (using 30.44 days per month), and years. This gives you a complete picture of the time period.
Absolutely! You can save unlimited events in the Saved Events tab. Each event shows its own countdown timer, category icon, and notes. Perfect for tracking multiple important dates simultaneously.
The calculator offers 5 event categories: Birthday (pink), Anniversary (red), Work (blue), Vacation (green), and Special (yellow/orange). Each category has a unique icon and color scheme for easy identification.
Your saved events are stored in your browser's local storage, so they persist across sessions. However, clearing browser data will remove them. We recommend using the Export feature to backup your events regularly.
Yes! The calculator displays a visual progress bar showing what percentage of the time period has passed. This is perfect for tracking project completion, goal progress, or how far along you are in a time period.
No registration, no hidden fees. Completely free to use with unlimited calculations and saved events.
Intuitive interface with beautiful design. Easy to use on desktop, tablet, and mobile devices.
Progress tracking, milestone detection, event categories, notes, and export functionality.
All data stored locally in your browser. No server uploads, complete privacy and security.