Convergence
Every 6 hours starting at midnight Friday night, there is a 'Convergence' in game. From a narrative perspective this is the leylines pulsing with energy, recharging magical abilities and some items. We call the time between two convergences one 'Game Day'. There are 5 convergences during an event. Although the 6am convergence between 1st and 2nd shift is outside of the game hours, it still happens for purposes of power refreshing.
At this time:
Players power point pools replenish
Any spells with a duration of 'Game Day' expire.
Abilities that can be used a certain number of times per 'Game Day' replenish
Effects which last the entire event last until the end of 4th shift.
When a Convergence happens, it is common practice to yell loudly 'Convergence!' as a way to notify everyone without a watch that it has happened. This is considered an out-of-game call.