Target-date facts
The resolved event date—after annual recurrence, if enabled—gets its own useful calendar profile.
Resolved target—
Weekday—
ISO week—
Day of year—
Quarter—
Year type—
OneFreePlace · Tool #119
Count down to a date—and know what every day means.
See exact calendar days, weeks, calendar months, weekdays and weekends, milestone dates, a live local countdown, target-date facts and recurring annual events. Save multiple countdowns privately in your browser and export the target plus planning milestones to your calendar.
✓ Exact calendar-day math✓ Annual recurrence
✓ Live local countdown✓ Milestone planner
✓ Private saved countdowns
Days Until Calculator
Count · recur · plan · save · export
Countdown setup
What are you counting down to?
Counting conventionStandard “days until” treats the reference date as day zero.
Annual mode uses the month and day from the selected target and automatically rolls to the next occurrence.
The live clock uses this device’s local time zone and browser daylight-saving rules. It is available when “Count from” is today.
Milestone plannerDates before the resolved target.
Whole numbers, comma or space separated. Up to 30 milestones.
Days until
Calendar-day exact—
days until
Choose a target date.
Weeks + days—exact from total calendar days
Calendar span—real years, months and days
Weekdays—Monday–Friday only; no holidays
Weekend days—Saturday + Sunday
Inclusive dates—both endpoints counted
24-hour equivalents—calendar days × 24, not DST-adjusted
Planning milestones—
Saved countdowns
Saved only in this browser. Reload a countdown later and its annual occurrence will resolve again automatically.
Built for real countdowns
Exact date-only mathCalendar-day counting uses date serials, avoiding daylight-saving shifts in the primary “days until” answer.
Annual eventsBirthdays, anniversaries and yearly events can roll forward automatically, including an explicit February 29 policy.
Live clock separatedOptional hours/minutes/seconds use the device’s local time zone, so elapsed time stays conceptually separate from calendar days.
Planning milestonesGenerate D−100, D−50, D−30, D−14, D−7 and D−1 dates—or enter your own sequence.
Private saved eventsKeep multiple countdowns in local browser storage without an account or server upload.
Calendar exportExport the target and milestone reminders as standards-friendly all-day ICS events.
Counting conventions, made explicit
Standard: the reference date is day zero. Tomorrow is 1 day away. Include both dates: counts every calendar date in the span, so today through tomorrow is 2 dates.
Weekday counts are Monday–Friday only and deliberately do not pretend to know public holidays. For holiday-aware deadlines, use OneFreePlace’s Business Days Calculator instead.
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Date-only and elapsed-time answers are different on purpose.The main answer is calendar-day arithmetic. The optional live clock uses your device’s local time and daylight-saving rules. For an event in another time zone, convert the event time first rather than assuming your local clock matches the event location.