My #2 is still very little so we are yet to figure out our routine involving a second baby... but routine with first baby goes:

DH home sometime between 3pm and 5pm... works for himself so changes daily... Generally he's home by 5pm which is when our routine starts...
5pm - snack for DD, play with DH while I start dinner
5.30pm - bath, I'm doing dinner and getting PJs ready
6pm - dinner for DD and us too, if it is ready and we are hungry
6.30pm - quiet play for DD
6.45pm - ready for bed (night nappy and drink of milk)
7pm - bed

Hopefully when DS is older he will just slot into the routine.