I found function TIMESTMP in library FNKSHN.PRG. DateTime stamp foms by formula:
(Y-1980)*2**25 + M*2**21 + D*2**16 + TH * 2**11 + TM*2**5 + TS
where
Y,M,D - year, month, day
TH, TM, TS - hours, minutes, seconds.
But 5 bit is only for 30 sec! What algorithm for reconstruction Date and Time.