Tick

From The Urban Dead Wiki

A tick is the moment when characters get an extra AP. Ticks occur at thirty-minute intervals until the character reaches maximum AP, at which point no additional ticks occur.

A tick does not necessarily happen at the head or middle of each hour. Instead, ticks are based on the last time that a character's AP decreased from its maximum possible value. As an example, if a character is at 50 AP and engages in an action at 09:37, their next tick will occur exactly thirty minutes later at 10:07. Subsequent ticks will occur at thirty minute intervals, until the character reaches their maximum AP. Actions taken after reaching max AP would serve to reset the time at which subsequent ticks occur.