There is no such thing as 9 to 5 in the SAF lah.
It is 8 to 530 or 9 to 630 both with a 1 hr lunch break and 2 15min
tea breaks which are optional.
Anyway in BMT yes if you are married you
MIGHT be able to get stay out status meaning
you book in 7am and leave at the end of the day when training ends
which could be as late as 9pm.