A time-based currency, or TimeBank, allows people to exchange their time and skills for another person's time and skills.
Like a mutual-credit currency, a TimeBank can consist of a ledger that records the amount of time each member has contributed, and to whom, establishing each member’s positive or negative balance. A TimeBank can also include a directory of services that members are offering and seeking, and allows for specialization while avoiding some of the problems of other money systems.
Generally, everyone's time is valued equally in a time-based currency which contributes strongly to an economic equality that is uncommon when other types of currency are used.
Time based currencies robustly decentralize and solve the issue of how, and by whom, the 'supply' of the currency is issued.