Is there any date-time module in c++

c++, c++-chrono, c++11, c++17, datetime

Solution

In the C++ standard: `<chrono>`

C++11

Starting with C++11, the standard library contains date & time utilities, available in the `<chrono>` header, with constructs within the `std::chrono` namespace.

Among these you will find:

- Clocks

- Time points

- Durations

- A flexible mechanism for parsing date & time values from strings

the library is heavily templated, so that you can use a type of your choice for the raw representation (even floating-point types), and set your own resolution.

Example of use: How to get current time and date in C++?

Note that `std::chrono` facilities are somewhat-compatible with the old `<ctime>` header types. For example, the "system clock" class has methods for converting to and from the `<ctime>` time representation, `time_t`. This will be useful to you if you're combining C and C++ code, or need to expose a C interface somewhere; otherwise - try avoiding `<ctime>`-based code.

C++20

The new standard version approved in 2020 added:

- Time zones

- Calendars

- More Duration types

- More time point types

- More clocks

Beyond the standard: Howard Hinnant's Date libraries

As commenters @AndyG and @doug suggest, Howard Hinnant is the "C++ date&time guy", and much of his work has actually gone into the standard - but not all of it.

Howard maintains a library/set-of-libraries of his own, named "Date".

- The "Date" library on GitHub

- "Date" library documentation

It is based on C++11 `<chrono>`, but its changes are not exactly what's been added in C++20; so especially useful if you're using C++17 or earlier. It adds:

- Timezones

- Calendars, including Julian and Islamic

- More Duration types

- More time point types

- Weeks

I'm assuming that eventually, all the good stuff from here will get standardized, but that hasn't happened yet.

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