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# 3 Date and time functions

All functions listed here are supported in:

-   [Trigger expressions](/manual/config/triggers/expression)
-   [Calculated items](/manual/config/items/itemtypes/calculated)

::: noteimportant
Date and time functions cannot be used in the
expression alone; at least one non-time-based function referencing the
host item must be present in the expression.
:::

|FUNCTION|<|<|<|
|--------|-|-|-|
|<|**Description**|**Function-specific parameters**|**Comments**|
|**date**|<|<|<|
|<|Current date in YYYYMMDD format.|<|Example:<br>=> **date**()<20220101|
|**dayofmonth**|<|<|<|
|<|Day of month in range of 1 to 31.|<|Example:<br>=> **dayofmonth**()=1|
|**dayofweek**|<|<|<|
|<|Day of week in range of 1 to 7 (Mon - 1, Sun - 7).|<|Example:<br>=> **dayofweek**()<6|
|**now**|<|<|<|
|<|Number of seconds since the Epoch (00:00:00 UTC, January 1, 1970).|<|Example:<br>=> **now**()<1640998800|
|**time**|<|<|<|
|<|Current time in HHMMSS format.|<|Example:<br>=> **time**()>000000 and **time**()<060000|

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