Question about Glezer firm sourdough starter

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My question concerns the feeding schedule.  Week one starts on Sunday, as calendar weeks usually do.  Week 2 starts with a Saturday refresh.  Is this Saturday two days later, which is technically still week 1, or am I to wait until day 9, which is actually the first Saturday in week 2?  Thanks!

http://weightloss-slim.fit/node/2390/firm-starter-glezer-recipe%3C/a%3E%3C/p%3E%3Cp%3E%C2%A0%3C/p%3E%3C/div%3E

Two days later after the first Thursday. Technically not worded right but you wouldn't wait 9 days between feeds.