Date & Time Calculator: Days

How many days until the contract ends, what date is 90 days from today, how many working days are left before the deadline? Date & Time Calculator: Days answers all three on one screen, down to the minute when you want it, and remembers how your week is built.

Four tabs, one clear answer each: «Count Days» measures the gap between two dates, «Add Days» moves a date forward or back by any amount of time, «Workdays» counts only the days you actually work, and «Add Workdays» lands on the date a job will be done when weekends do not count.

WHY YOU WILL LIKE DATE & TIME CALCULATOR: DAYS

• «Count Days»: pick a «Start Date» and an «End Date» and read the difference as years, months and days, then «Or» as a single total of calendar days. Switch «Include time» to «Yes» and hours and minutes join the result.
• «Add Days»: enter years, months, weeks, days, hours or minutes, choose «Add» or «Subtract», and get the exact resulting date with its weekday. Months and years are added the calendar way, so 31 January plus one month does not spill into March.
• «Workdays»: tick which weekdays count, Monday to Friday, Monday to Saturday, Sunday to Thursday, any pattern, and see the number of working days between two dates.
• «Add Workdays»: add or subtract a number of working days and skip straight over the days you do not work. Fifteen working days from a Wednesday is a date, not a guess.
• «Include Start Date»: decide whether the first day is day one or day zero; useful for notice periods, trial periods and warranties where the rule differs.
• «Displayed input fields»: hide the fields you never use, so «Add Days» can be just days and weeks if that is all you need.
• Every tab remembers its options, so your week and your preferences are already set the next time you open the app.
• Any date from the year 1 to a thousand years ahead, with the ten days dropped in the 1582 calendar reform taken into account.
• Works offline, no account, light and dark theme, 73 languages, results in your own date format.

HOW IT WORKS

1. Choose a tab: «Count Days», «Add Days», «Workdays» or «Add Workdays».
2. Pick the dates, or the amount of time or working days to add or subtract.
3. Tap «Calculate» and read the result, with the weekday spelled out.

PERFECT FOR

• Freelancers and project managers quoting delivery dates in working days.
• HR, legal and finance people counting notice periods, payment terms and deadlines.
• Students tracking how many days remain until exams or how long a term really is.
• Anyone planning a trip, a renovation or a visa stay and needing the exact number of days.

A FEW TIPS

• Keep «Include time» on «No» for whole-day questions; switch it on when hours matter, for example when a booking starts at 15:00.
• Set the weekday boxes once to match your real week; a six-day shop week or a Sunday-to-Thursday office is two taps away.

CALENDAR MATH THAT STAYS HONEST

A difference is shown both ways on purpose: years, months and days for people, a plain total of days for contracts and spreadsheets. Adding a month means the same day next month, not thirty days; adding working days skips the weekend you defined, not someone else's. The result is a date you can act on.

YOUR DATA STAYS WITH YOU

Nothing is uploaded and no account is needed. Your options are kept on the device, the calculator works without internet, and «Useful Content» opens its articles inside the app only when you ask for them.

Date calculator and time calculator: count the days, duration and interval between dates, find the date difference in years, months, weeks and days, add or subtract time from any date to see when a bill is due, and count business days with your own work week, offline, in 73 languages.

Download Date & Time Calculator and get the exact date, not an estimate.