https://help.zoho.com/portal/en/community is too poor resource for us, but it's the only !
Some function are enable in creator, but many people don't know where to find them.
Example, same with me ,try multiple methods to transform 12hr or 24hr, in fact, zoho creator have this function.
Suppose now is 2016-04-29 15:30:12 :
info zoho.currenttime.tostring("hhmmss") // show 033012
info zoho.currenttime.tostring("HHmmss") // show 153012
If it can help somebody, I should be very happy!