Day

From NWNWiki

A day is an ingame unit of time that lasts 24 game hours / 48 minutes (48 turns or 480 rounds).

Resting refreshes spells or effects that are usuable one or more times per day. For example, if you have a spell or ability that is "usable once per day," you can use it, immediately rest, and then use it again right away.

[edit] Notes

• Not resting for 48 minutes of real time will not restore per day abilities and spells. In other words, waiting an actual "game" day does not restore such abilities.