Time Calculator: Days, Weeks, Months and Years Between Two Dates

This page has five calculators for dates and times. The Time Calculator directly below works out the duration between two points in time to the minute, adds or subtracts days, weeks, months or years from a date, converts units and counts working days minus the public holidays of a German state. Further down are separate calculators for the calendar week, a countdown to a date, the end of a deadline under the German Civil Code and the day of the week of any date.

• Time calculator: time span, date plus/minus, convert units, working days
• Calendar week: the current week number and all weeks of a year
• Countdown to a date: days, hours, minutes and seconds, for example until Christmas
• Deadline calculator: end of a period under §§ 187, 188 and 193 BGB
• Day of the week: which weekday a date was or will be

Dates use the day.month.year format with a 24-hour clock.

How to use the time calculator

The calculator has four tabs: Time span, Date plus/minus, Convert units and Working days. Below each result, the button Copy link to this result copies an address that reopens the calculation with the same input.

Time span: days between two dates

1. Enter the start date and time in the first field (day.month.year hour:minute). A calendar opens when you click into the field. Without a time, midnight is used. A year on its own counts as 1 January: 1993 to 2026 gives 33 years. The Now button fills in the current time.
2. Enter the end date and time in the second field or tick Until now to use the current time of your device as the end.
3. The result appears immediately and updates with every change: years, months, weeks, days, hours and minutes, followed by the total days, weeks, months, hours and minutes and, from one full week, a row of dots, one dot per week.

If the last day should count, for example for a holiday from the 1st to the 14th, tick Count the end day (adds one day). The quick selection Today until end of year, Today until Christmas Eve and Start of year until today sets start and end with one click.

Date plus/minus: what date is 100 days from now?

Choose a start date (today is filled in), plus or minus, a number and a unit: days, weeks, months or years. The result is a date with its weekday, for example 100 days after 14 October 2026: Friday, 22.01.2027. For weeks, months and years the calculator also shows the distance from the start date in days, and for every result the calendar week and the day of the year. If the day does not exist in the target month, it uses the last day of that month: 31 August 2026 plus 6 months is 28 February 2027, or the 29th in a leap year.

Convert units: days to weeks and months

Enter a number and a unit and the calculator shows the same duration in days, weeks, months, years and hours. 100 days are 14 weeks and 2 days, about 3.3 months, about 0.27 years or 2,400 hours. Without a date, months and years are averages (1 month = 30.44 days, 1 year = 365.25 days); for a result on the calendar, use Date plus/minus.

Working days: how many working days between two dates

Enter the From and To dates and choose a German state under Public holidays of, or Nationwide holidays only. The calculator shows working days (Monday to Friday), working days including Saturday (Monday to Saturday), calendar days, Saturdays and Sundays, the holidays falling Monday to Friday and a list of the public holidays in the period with their weekday.

Start and end day are always included here, unlike in the Time span tab without Count the end day. Only holidays that apply throughout the selected state are deducted; regional ones such as Corpus Christi in parts of Saxony and Thuringia or Assumption Day in parts of Bavaria are not. Company holidays and leave are not deducted. The Working days tab works from 1 January 1995.

What the result means

In the Time span tab, the six rows from Years to Minutes build on each other. The calculator first counts the full years, then the full months of the remainder, then weeks, days, hours and minutes. The figures are not conversions of the same duration but a chain.

Example: from 1 March 2024 at 08:00 to 3 September 2026 at 10:30 is 2 years, 6 months, 0 weeks, 2 days, 2 hours and 30 minutes. The whole span is 916 days, which is 130 full weeks.

The rows Total days and Total weeks convert the whole span into full days and full weeks independently of the chain. They are the figures you need when a duration has to be expressed in days or weeks, for instance for a project plan or a pregnancy; the end of a period under German law is worked out by the deadline calculator.

Which calendar week is it today?

This calculator shows the calendar week of today, based on the date of your device, together with the Monday and Sunday of that week.

For another date, enter it under Calendar week of a date in the format day.month.year; the Today button sets today’s date again. Under All calendar weeks of the year, enter a year between 1900 and 2100. The table lists every calendar week with its Monday and Sunday and marks the current week.

Weeks are counted according to ISO 8601, as used in Germany: a week starts on Monday, and week 1 is the week containing the first Thursday of the year. The first and last days of a year can therefore belong to a week of the neighbouring year. Example 2026: 1 January 2026 is a Thursday, so week 1 already starts on Monday, 29.12.2025. The year has 53 calendar weeks; week 53 runs from Monday, 28.12.2026, to Sunday, 03.01.2027, and week 1 of 2027 starts on 04.01.2027.

How many days until Christmas? Countdown to a date

This calculator counts down the time to a date in days, hours, minutes and seconds and updates the display every second.

Enter the date and time under Target date and time in the format day.month.year hour:minute. The next Christmas Eve, 24 December at 00:00, is filled in; the quick selection sets Christmas Eve, New Year (midnight) or Easter Sunday with one click, each time the next occurrence. Below the clock you see the target with its weekday and the row Calendar days until the target day. Once the target has passed, the calculator counts the time since.

Example: on 1 December at 18:00 the clock shows 22 days, 06 hours, 00 minutes and 00 seconds until Christmas Eve at 00:00. The row Calendar days until the target day shows 23, because it counts whole calendar days and ignores the time. The calculation uses the clock and time zone of your device, with the time as it appears on the clock. When the clocks change to or from summer time, the display therefore jumps by one hour.

Deadline calculator: when a period ends under the German Civil Code

The deadline calculator determines the last day of a period under §§ 187, 188 and 193 of the German Civil Code (BGB), taking weekends and the public holidays of a German state into account.

First choose under What starts the period? whether an event starts it, such as receipt of a letter, or the start of a day, such as the start of a tenancy. For an event, the day of the event is not counted (§ 187 (1) BGB); for the start of a day, that day is counted (§ 187 (2) BGB). Then enter the date under Day of the event or First day of the period, the number under Period and days, weeks, months or years under Unit; the quick selection sets 14 days, 2 weeks, 1 month or 3 months. Under End of the period you see the last day with its weekday. The period ends when that day ends, at midnight.

After an event, periods in weeks and months end on the day with the same weekday or the same number; after the start of a day, they end on the day before. If that day does not exist in the last month, the period ends on the last day of the month (§ 188 (2) and (3) BGB). The box for § 193 BGB (not ticked by default) moves an end on a Saturday, Sunday or public holiday to the next working day that is not a Saturday. Under § 193 BGB this applies when a declaration of intent has to be made or performance has to be rendered by the end of the period. Choose the holidays under Public holidays at the place of performance. Without the tick, the calculator points out when the calculated end falls on such a day.

Example: a letter is received on Saturday, 17.10.2026, and the period is 2 weeks. The first day of the period is Sunday, 18.10.2026, the calculated end Saturday, 31.10.2026. With the box for § 193 BGB ticked, the end moves past Saturday and Sunday to Monday, 02.11.2026, whichever holidays are selected. One month from receipt on 31.01.2027 ends on Sunday, 28.02.2027, because February has no 31st; with § 193 BGB on Monday, 01.03.2027.

The deadline calculator works for periods ending in 1995 or later. It does not take into account public holidays that apply only in parts of a state, nor special rules in individual statutes. According to the Federal Court of Justice, § 193 BGB does not apply to notice periods for termination, not even to the last day on which the notice must be received (judgment of 17 February 2005, III ZR 172/04). For a notice period, leave the box for § 193 BGB unticked unless a statute or the contract provides otherwise. The result is not legal advice.

What day of the week was it? Find the weekday of any date

This calculator names the day of the week of a date, in the past or in the future.

Enter a date under Date in the format day.month.year; today is filled in, and the Today button sets it back. Under Result you see the weekday, the calendar week, the day of the year and the distance from today in days. Below, The same date in the coming years lists the next ten anniversaries with their weekday.

Example: 9 November 1989 was a Thursday, in calendar week 45, day 313 of the year. The calculation uses the Gregorian calendar, also for dates before its introduction.

Typical calculations

• Years between two dates: from 1 September 2014 to 3 September 2026 is 12 years and 2 days, 4,385 days in total.
• Exact age: date and time of birth as the start, Until now ticked.
• Length of employment: start date of the job as the start, Until now or the leaving date as the end.
• Time remaining until a date: enter the date as the start and tick the Until now box; the calculator swaps the order itself and shows the remaining time. For a live countdown to the second, use the countdown further down the page.
• Deadlines under German law: the deadline calculator applies §§ 187, 188 and 193 BGB, including weekends and public holidays.
• Contract terms, notice periods, warranties: contract start and contract end as start and end.
• Project duration, study duration, parental leave: enter start and end and read off the total number of weeks.
• Working days in Germany for leave, payroll or a project plan: choose the period and the state in the Working days tab.

Converting weeks, months and years

These values help with rough estimates when no specific date is known. Exact results need real dates, because months have 28 to 31 days and leap years have one day more.

Value	Equals
1 week	7 days, 168 hours
1 month	30.44 days on average (365.25 days divided by 12)
1 year	365 days, 366 in a leap year; 52 weeks and 1 day
14 weeks	98 days, roughly 3.2 months
30 weeks	210 days, roughly 6.9 months
100 days	14 weeks and 2 days, roughly 3.3 months
6 months	182.6 days on average; 181 to 184 days on the calendar, depending on the start month
1,000 days	142 weeks and 6 days, roughly 2 years and 9 months

How the calculator counts

• Calendar-based: years and months are counted on the calendar, not with average values. Leap years and months of different length are taken into account.
• Order does not matter: if the start lies after the end, the calculator swaps the two and shows a positive duration.
• Clock time on the calendar: the calculation uses date and time as they appear on the calendar. A day runs from midnight to midnight, also across a daylight saving change; hours, minutes and the totals follow the same calculation.
• Range: the date picker runs from 1 January 1900 up to ten years into the future, entered as day.month.year, with a time as day.month.year hour:minute. Working days and deadlines are calculated from 1995.
• In your browser: all calculators on this page run entirely on your device. While you calculate, no input is transmitted to minoka.de or to third parties. Each calculator has its own button Copy link to this result; the link carries the input of that calculator in the address. If someone opens such a link, the input reaches minoka.de as part of the address, like any page request, and the visitor statistics of minoka.de record that address.