In an AL FAQ, this is stated about the Clone spell:
A clone isn’t mature (and therefore provides no benefit) until the recipient spends a total of 120 downtime days after casting it.
But in the DMG it says:
This clone forms inside a sealed vessel and grows to full size and maturity after 120 days;
The DMG makes it sound like you need to wait 120 days no matter what you're doing during those days, whereas the AL FAQ makes it sound like you need to take 120 days worth of downtime before it's ready. Which is it?