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A date and time library based on the C++11 (and beyond) <chrono> header

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Join the chat at https://gitter.im/HowardHinnant/date


Try it out on wandbox!

This is actually several separate C++11/C++14 libraries:

  1. "date.h" is a header-only library which builds upon <chrono>. It adds some new duration types, and new time_point types. It also adds "field" types such as year_month_day which is a struct {year, month, day}. And it provides convenient means to convert between the "field" types and the time_point types.

  2. "tz.h" / "tz.cpp" are a timezone library built on top of the "date.h" library. This timezone library is a complete parser of the IANA timezone database. It provides for an easy way to access all of the data in this database, using the types from "date.h" and <chrono>. The IANA database also includes data on leap seconds, and this library provides utilities to compute with that information as well.

  3. "iso_week.h" is a header-only library built on top of the "date.h" library which implements the ISO week date calendar.

  4. "julian.h" is a header-only library built on top of the "date.h" library which implements a proleptic Julian calendar which is fully interoperable with everything above.

  5. "islamic.h" is a header-only library built on top of the "date.h" library which implements a proleptic Islamic calendar which is fully interoperable with everything above.

"date.h" and "tz.h" are now being proposed for standardization:

List of projects using this library:

If you would like your project (or product) on this list, just let me know.

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A date and time library based on the C++11 (and beyond) <chrono> header

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