let identifiers: [Calendar.Identifier] = [.buddhist, .chinese, .coptic, .ethiopicAmeteAlem, .ethiopicAmeteMihret, .gregorian, .hebrew, .indian, .islamic, .islamicCivil, .islamicTabular, .islamicUmmAlQura, .iso8601, .japanese, .persian, .republicOfChina]
identifiers.forEach {
    let calendar = Calendar(identifier: $0)
    let year = calendar.component(.year, from: Date())
    print("For: \(calendar.identifier) got: \(year)")
}

Output:

For: buddhist got: 2565
For: chinese got: 39
For: coptic got: 1738
For: ethiopicAmeteAlem got: 7514
For: ethiopicAmeteMihret got: 2014
For: gregorian got: 2022
For: hebrew got: 5782
For: indian got: 1944
For: islamic got: 1443
For: islamicCivil got: 1443
For: islamicTabular got: 1443
For: islamicUmmAlQura got: 1443
For: iso8601 got: 2022
For: japanese got: 4
For: persian got: 1401
For: republicOfChina got: 111