When do periods of the day start in Java 17? https://twitter.com/tomwhoscontrary/status/1433090964898340869

WhenDoPeriodsStart.java

import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class WhenDoPeriodsStart {

    public static void main(String[] args) {
        Locale locale = Locale.forLanguageTag(args[0]);

        System.out.println("vendor = " + System.getProperty("java.vm.vendor"));
        System.out.println("version = " + System.getProperty("java.runtime.version"));
        System.out.println("locale = " + locale);

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("B").withLocale(locale);

        LocalTime prevTime = null;
        String prevPeriod = null;
        LocalTime time = LocalTime.MIDNIGHT;
        while (prevTime == null || time.isAfter(prevTime)) {
            String period = formatter.format(time);
            if (!period.equals(prevPeriod)) {
                System.out.println(time + " " + period);
            }
            prevTime = time;
            prevPeriod = period;
            time = time.plusMinutes(1);
        }
    }

}