You could still wash and put away now and just re wash later!
Last time I washed them around 4 weeks before just incase he came early, I’ll probably do the same this time aswell, maybe a little earlier as it’s my second x
I think now is fine, provided you have somewhere to put them. I have some clothes that I only wear once or twice a year, but they're absolutely fine in the cupboard/drawer for that long, not musty or anything at all. I think if things are going musty in a drawer for a few months then they probably weren't completely clean to start with 🤷🏼♀️
No more than 4-6 weeks before, you don’t want them to go musty/dusty or mouldy being left for months!