Canix wrote:
But that would be too much for user who had to enter the date and time
altogether. Is there anyway that can perform automatically where user
only need to enter the time.

Time and date entry can be done more quickly using the shortcuts:
Date: CTRL-;
Time: CTRL-SHIFT-;

So to enter the date and time, just use:
<CTRL-;<space<CTRL-SHIFT-;

Note: this only works if you want the current date and/or time to be
entered.