in TMG enddate

Hi,

in table maintenance generator i have a fields, in that one field enddate is there.

in this enddate field by default value should display like : 31.12.9999

for this i wrote a event 05 .. manually assign the value to that(31.12.9999) but in sm30 when we create new entry it is showing wrong value 99.2..31.1

is there any function module for that

can any one plz tell me the solution for this

Thanks in advance

geetha