muscle conditioning starts to drop after even 1 week off technicality. once you get to 2 weeks and 3 weeks you will come back and notice you are much weaker and sore.
but if you are that obsessed with it then this tells me you haven't put in the hours and consistency yet. because as mobster said 'who cares'.. pro athletes have offseasons, then come back strong each season.. they been doing it all their lives so they have a ton of body memory
it actually isn't a bad idea to take time away once or twice a year and let the body repair a bit.. in fact i recommend my clients do 1 month of bikram yoga once a year just to help with imbalances and flexibility, then go back to the grind again. you will actually benefit greatly from this