1e41f4b71Sopenharmony_ci# date 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## Command Function 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ciThis command is used to query the system date and time. 7e41f4b71Sopenharmony_ci 8e41f4b71Sopenharmony_ci 9e41f4b71Sopenharmony_ci## Syntax 10e41f4b71Sopenharmony_ci 11e41f4b71Sopenharmony_ci- date 12e41f4b71Sopenharmony_ci 13e41f4b71Sopenharmony_ci- date --help 14e41f4b71Sopenharmony_ci 15e41f4b71Sopenharmony_ci- date +[_Format_] 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci- date -u 18e41f4b71Sopenharmony_ci 19e41f4b71Sopenharmony_ci 20e41f4b71Sopenharmony_ci## Parameters 21e41f4b71Sopenharmony_ci 22e41f4b71Sopenharmony_ci**Table 1** Parameter description 23e41f4b71Sopenharmony_ci 24e41f4b71Sopenharmony_ci| Parameter | Description | Value Range | 25e41f4b71Sopenharmony_ci| ------- | ------------------------------ | ---------------------- | 26e41f4b71Sopenharmony_ci| --help | Displays help information. | N/A | 27e41f4b71Sopenharmony_ci| +Format | Prints the date and time in the specified format.| Placeholders listed in **--help**| 28e41f4b71Sopenharmony_ci| -u | Displays UTC (not the current time zone). | N/A | 29e41f4b71Sopenharmony_ci 30e41f4b71Sopenharmony_ci 31e41f4b71Sopenharmony_ci## Usage Guidelines 32e41f4b71Sopenharmony_ci 33e41f4b71Sopenharmony_ci- If no parameter is specified, the system date and time in UTC format are displayed by default. 34e41f4b71Sopenharmony_ci 35e41f4b71Sopenharmony_ci- The **--help**, **+Format**, and **-u** parameters are mutually exclusive. 36e41f4b71Sopenharmony_ci 37e41f4b71Sopenharmony_ci- Currently, this command cannot be used to set the time or date. 38e41f4b71Sopenharmony_ci 39e41f4b71Sopenharmony_ci## Note 40e41f4b71Sopenharmony_ci 41e41f4b71Sopenharmony_ciThe shell does not support **date -u**. mksh supports it. To switch to mksh, run **cd bin** and **./mksh**. 42e41f4b71Sopenharmony_ci 43e41f4b71Sopenharmony_ci## Example 44e41f4b71Sopenharmony_ci 45e41f4b71Sopenharmony_ciRun **date +%Y--%m--%d**. 46e41f4b71Sopenharmony_ci 47e41f4b71Sopenharmony_ci 48e41f4b71Sopenharmony_ci## Output 49e41f4b71Sopenharmony_ci 50e41f4b71Sopenharmony_ciSystem date in the specified format: 51e41f4b71Sopenharmony_ci 52e41f4b71Sopenharmony_ci 53e41f4b71Sopenharmony_ci``` 54e41f4b71Sopenharmony_ciOHOS:/$ date +%Y--%m--%d 55e41f4b71Sopenharmony_ci1970--01--01 56e41f4b71Sopenharmony_ci``` 57