Non-SI unit of time, \(\text{a}=31\ 556\ 952\ \text{s}\). The year is not commensurable with the @D01527@ and not a constant. The value given corresponds to the Gregorian calendar year (\(\text{a}=365.2425\ \text{d}\)).
Source: Green Book, 2
nd ed., p. 111 [
Terms] [
Book]