http://na.finalfantasyxiv.com/lodest...ption_service/

Veteran Rewards are special in game item bonuses awarded based on how long you have had an active subscription. These rewards will be distributed via the moogle delivery service once you have reached a certain number of days subscribed.

Veteran Rewards are granted based on the number of days subscribed rather than time played. For example, a player who subscribes for 90 days is eligible to receive the 30, 60, and 90 day Veteran Rewards all on their first day.

I don't think this has to do with time played at all!