1# date 2 3 4## Command Function 5 6This command is used to query the system date and time. 7 8 9## Syntax 10 11- date 12 13- date --help 14 15- date +[_Format_] 16 17- date -u 18 19 20## Parameters 21 22**Table 1** Parameter description 23 24| Parameter | Description | Value Range | 25| ------- | ------------------------------ | ---------------------- | 26| --help | Displays help information. | N/A | 27| +Format | Prints the date and time in the specified format.| Placeholders listed in **--help**| 28| -u | Displays UTC (not the current time zone). | N/A | 29 30 31## Usage Guidelines 32 33- If no parameter is specified, the system date and time in UTC format are displayed by default. 34 35- The **--help**, **+Format**, and **-u** parameters are mutually exclusive. 36 37- Currently, this command cannot be used to set the time or date. 38 39## Note 40 41The shell does not support **date -u**. mksh supports it. To switch to mksh, run **cd bin** and **./mksh**. 42 43## Example 44 45Run **date +%Y--%m--%d**. 46 47 48## Output 49 50System date in the specified format: 51 52 53``` 54OHOS:/$ date +%Y--%m--%d 551970--01--01 56``` 57