Embarrassingly stupid question πŸ˜†πŸ˜†

Molly

So, when doing dates such as "6w3d, 7w5d" etc, do the dates start as 6w0d or 6w1d?

Like, my dates should roll over every Wednesday (based on LMP). So, if I'm 6 weeks tomorrow, then does it go to 6w6d, and then next Wednesday it changes to 7 weeks? It just seems so weird because obviously there's 7 days in a week but there's not normally a "0" day lol

TIA!!