http://zkfiddle.org/sample/3pu2mjc/1-datebox-bug-with-format

Following the http://books.zkoss.org/wiki/ZK_Developer%27s_Reference/Internationalization/Date_and_Time_Formatting there are 4 types.

As you can see :

• full and short gives only minutes
• long and medium only gives minutes and seconds.

Unable to set the hour with any predefined time format.

If you use the normal styling (HHH:mm:ss), everything works correct.