loool no its not silly
I wondered the same thing til I have my first. Trust me, baby will take up your whole day, and when baby is sleeping you'll either be sleeping or doing house-work. You probs wont feel like normal for a gd cpl of months down the line. But it is great when you can get to that point where life is more manageable & you can arrange 1/2 days and full days out. I think planning is the key/where to go/what to take/outfits for baby ect - coz if u leave it til on the day you might find it harder.
I'd say going from experience, your mat leave will fly in & as i'm sure EVERY mum will tell you - those first few months totally fly in. You'll be back at work before you know it!