---
name: "std::chrono::system_clock"
section: "3"
platform: "linux"
package: "gcc"
version: "16.2.1+r23+gd564253eb6c8-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/std::chrono::system_clock"
---

# std::chrono::system\_clock(3)

System clock.

## NAME

std::chrono::system\_clock - System clock.

## SYNOPSIS

\#include \<chrono\>

### Public Types

typedef **chrono::nanoseconds** **duration**\
 typedef duration::period **period**\
 typedef duration::rep **rep**\
 typedef **chrono::time\_point**\< **system\_clock**, duration \> **time\_point**\

### Static Public Member Functions

static time\_point **from\_time\_t** (std::time\_t \_\_t) noexcept\
 static time\_point **now** () noexcept\
 static std::time\_t **to\_time\_t** (const time\_point &\_\_t) noexcept\

### Static Public Attributes

static constexpr bool **is\_steady**\

## Detailed Description

System clock.

Time returned represents wall time from the system-wide clock.

## Author

Generated automatically by Doxygen for libstdc++ from the source code.