📅 Day Counter
Count days between dates, countdown to events & track milestones
✓ Days Between Dates ✓ Countdown ✓ MilestonesUse the Working Days Calculator — supports US federal holidays, custom holidays, Fri/Sat weekends and add/subtract working days from a date.
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The Day Counter calculates the number of days between two dates instantly, with a full breakdown into weeks, months, years, hours, and minutes. Enter a start date and end date to count the days between them, use the Countdown tab to track days remaining until an upcoming event, or open the Milestone Tracker to see exactly when key day milestones arrive from any start date. All three modes work without sign-up, run entirely in the browser, and pre-fill today’s date so results appear in one click.
How to Count Days Between Two Dates
To count the number of days between two dates, the calculator subtracts the earlier date from the later one. The result is the total number of elapsed calendar days. If you want to include the end date itself in the count — for example, when counting the duration of a contract that runs from January 1 through January 31 inclusive — toggle the “include end date” option, which adds one day to the result.
Day count formula:
Days between dates = End date − Start date (in days)
Weeks = Total days ÷ 7
Months (approx.) = Total days ÷ 30.44
Hours = Total days × 24
Example: From March 1, 2025 to September 30, 2025 is 213 calendar days, 30 weeks and 3 days, approximately 6.99 months, and 5,112 hours. The Day Counter shows all of these simultaneously so you never have to convert manually.
Day Counter: Calendar Days vs. Weekdays
When counting days between two dates, the result depends on which type of days you need. The default count includes every calendar day — weekdays and weekend days alike. For a quick weekday-only count, toggle the “exclude weekends” option to show only Monday through Friday days in the result.
| Mode | What it counts | Best for |
|---|---|---|
| Calendar days | Every day including weekends and holidays | Personal events, travel, anniversaries, pregnancy tracking |
| Weekdays only | Monday through Friday in the date range | Quick office-day estimates without holiday exclusions |
Need business days with US holiday exclusions? The Working Days Calculator handles business day counting with US federal holidays, custom holidays, Fri/Sat weekend settings, and the ability to add or subtract working days from a date.
Day Counter for Countdown: Days Until an Event
The Countdown tab of the Day Counter calculates how many days until a future date — a wedding, product launch, exam, vacation, or any personal deadline. Enter the event date and an optional label. The result displays remaining days, weeks, months, and the day of the week the event falls on. A circular progress ring shows visually how close the event is relative to one year out.
Common uses for a day countdown include:
- Days until Christmas or other annual holidays
- Days until vacation or a flight departure
- Days until a birthday or anniversary
- Days until an exam, court date, or filing deadline
- Days until a contract expires or a notice period ends
Tip: If the event date has already passed, the Day Counter shows how many days ago it occurred — useful for tracking how long ago something happened, such as the number of days since a surgery, the start of a job, or a sobriety date.
Milestone Tracker: 100 Days, 1,000 Days and Beyond
The milestone tracker calculates the exact calendar date of key day milestones from any start date and shows which milestones have already been reached and which are still upcoming. This is useful for:
- Tracking days sober or in recovery
- Monitoring the 100-day and 1,000-day marks of a new habit, business, or relationship
- Marking a child’s first 100 days, 500 days, or first birthday in days
- Project retrospectives that reference day counts from a launch date
Milestones tracked include: 50, 100, 200, 365 (one year), 500, 730 (two years), 1,000, 1,500, 2,000, 3,000, 5,000, and 10,000 days. Each milestone card shows the exact date it falls on and the day of the week.
Frequently Asked Questions
How do I count the number of days between two dates?
Enter your start date and end date in the Days Between Dates tab and click Count Days. The Day Counter instantly shows the total number of calendar days, plus a full breakdown into weeks, months, years, hours, and minutes. Toggle “include end date” if you want to count both the first and last day as full days.
Does the day count include the start date and end date?
By default, the Day Counter counts from the start date up to but not including the end date. This matches the convention used by most date libraries and spreadsheet functions. If you need to include the end date — for example, for an event running from the 1st through the 31st of a month — check the “include end date” option to add one day to the result.
How many days are in a year?
A common year has 365 days. A leap year has 366 days and occurs every four years, with minor exceptions for century years. When converting a day count to years, the calculator uses 365.25 as the average to account for the leap year cycle over time.
How do I calculate days until a future date?
Use the Countdown to Date tab. Enter the future date and an optional event name. The result shows the exact number of days remaining from today, along with weeks, months, and the day of the week the date falls on. The result is based on today’s date each time the calculator runs.
Can I count days from a past date to today?
Yes. In the Days Between Dates tab, set the start date to any past date and the end date to today to get the elapsed day count. In the Milestone Tracker tab, enter any past date as the start date to see how many days have elapsed and which day milestones have already been reached.
How do I count business days between two dates?
This tool counts calendar days and weekdays only. For business day counting with US federal holidays, custom holidays, or non-standard workweeks (such as Friday/Saturday weekends), use the dedicated Working Days Calculator, which also supports adding or subtracting working days from a date.
Conclusion
The Day Counter covers three distinct use cases: counting days between any two dates with a full breakdown into weeks, months, years, hours, and minutes; counting down to a future event with a visual ring and day-of-week display; and tracking exact milestone dates from any start date. For business day counting with holiday exclusions, the Working Days Calculator is the dedicated tool. No login or download required for any of these tools.