The singleton instance for the current era, 'Buddhist Era', which has the value 1.
The singleton instance for the era before the current one, 'Before Buddhist Era', which has the value 0.
Obtains an instance of ThaiBuddhistEra
from a value.
Obtains an instance of ThaiBuddhistEra
from a value.
The current era (from ISO year -543 onwards) has the value 1 The previous era has the value 0.
the era to represent, from 0 to 1
the BuddhistEra singleton, never null
if the era is invalid