The Hour macro inserts the hour value from the current time.
The syntax for this macro is %[Hour]
If the current time is 10:22 then the [Hour] macro inserts '10':
Figure 1. %[Hour] Macro Example
Note that this macro is often used in conjunction with other macros in order to create combined output. For example the combined macros %[Hour]:%[Minute] output the hour followed by the minutes of the hour:
Figure 2. %[Hour] Combined Macro Example