Unit that represents the concept of an era.
The ISO calendar system doesn't have eras thus it is impossible to add
an era to a date or date-time.
The estimated duration of the era is artificially defined as {@code 1,000,000,000 Years}.
!(p)
When used with other calendar systems there are no restrictions on the unit.
Unit that represents the concept of an era. The ISO calendar system doesn't have eras thus it is impossible to add an era to a date or date-time. The estimated duration of the era is artificially defined as {@code 1,000,000,000 Years}. !(p) When used with other calendar systems there are no restrictions on the unit.