Points lost to ability damage return at the rate of 1 point per day
Most creatures with breath weapons are limited to a number of uses per day...
[context: diseases] Once per day afterward, he must make a successful Fortitude saving throw to avoid repeated damage.
Damage: The ability damage the character takes after incubation and each day afterward.
The time to create a magic item depends on the feat and the cost of the item. The minimum time is one day.
Brewing a potion takes one day.
Enhancing a weapon, suit of armor, or shield takes one day for each 1,000 gp in the price of its magical features.
Crafting a rod takes one day for each 1,000 gp in its base price.
Keith said:I never thought of this as an issue, although clearly it can be.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.