Search for Default Time in LO-Help. The following text appears: Default time Sets the default time. If you do not enter a value, the current time is inserted. This is from the help for forms, form-controls for time and date. The form-controls don't insert the current time or the current date, if no value is entered. There is no way to insert the current time or current date for the default value.
Andras Timar committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/help/commit/?id=e20a440a44734b614243108db035d30cd07c9970 fdo#48328 remove paragraphs which are not true
Andras Timar committed a patch related to this issue. It has been pushed to "feature/submodules": http://cgit.freedesktop.org/libreoffice/help/commit/?id=e20a440a44734b614243108db035d30cd07c9970&g=feature/submodules fdo#48328 remove paragraphs which are not true