Dates & Times

Dates & Times offers 12 free tools, with no registration, for calculating, converting and organizing time markers. Age calculator gives an exact age at a chosen date, Add days shifts a deadline, and Business days counts Monday through Friday. The subcategory helps with planning, invoices, projects or a simple calendar check.

Start from the calculation you need. For an age, pick Age calculator. To shift a date, use Add days. ISO week, Day of the Year, Leap year and Day of the week answer precise questions. Time Zone Converter, Cron builder, Duration sum, Date range generator and Countdown cover more technical or planned needs.

How to use

  1. For an age or a deadline, start with Age calculator or Add days, then check the resulting day with Day of the week.
  2. For a working delay, use Business days, and to place a date in the year, go through ISO week, Day of the Year or Leap year.
  3. To convert a time, open Time Zone Converter, then use Cron builder if you need to schedule a repetition.
  4. To add durations or list a period, take Duration sum and Date range generator, then finish with Countdown if a deadline is near.

Frequently asked questions

What is the difference between Add days and Date range generator?

Add days shifts one date by a number of days. Date range generator lists every date between two bounds. The first finds a deadline, the second prepares a calendar.

How do I count days without weekends?

Business days counts the days from Monday to Friday. That helps estimate a processing delay or a working period. For a duration in hours, look instead at Duration sum.

Can I convert a time between two countries?

Time Zone Converter converts a time between two UTC offsets. Enter the offsets involved to get the matching time. Cron builder then helps plan a recurring task.

How do I check a date before using it?

First calculate with Age calculator or Add days, then verify the day of the week. If the date falls in a working period, go through Business days. For an annual marker, use ISO week, Day of the Year or Leap year. This check avoids starting from a wrong date.

Which tool should I use to plan a repeating task?

Start with Time Zone Converter if the time depends on a UTC offset. Then compose the expression with Cron builder. If you need to count the remaining time, use Countdown. To list every relevant date, Date range generator is the most direct.

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