/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
import java.time.* ;
import java.time.format.* ;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
Instant instant = Instant.ofEpochMilli( 1_564_088_400_000L ) ;
 
ZoneId z = ZoneId.of( "America/Montreal" ) ;  
LocalDate today = LocalDate.now( z ) ;
 
ZonedDateTime zdt = instant.atZone( z ) ;
 
DayOfWeek dow = zdt.getDayOfWeek() ;
 
 
System.out.println( "instant.toString(): " + instant ) ;
System.out.println( "zdt.toString(): " + zdt ) ;
System.out.println( "dow.toString(): " + dow ) ;
 
ZoneOffset offset = ZoneOffset.UTC ;  // Constant for UTC (an offset of zero hours-minutes-seconds). 
OffsetDateTime odt = instant.atOffset( offset ) ;
 
 
// When viewed with a time zone farther to the east, more ahead of UTC, we see Friday rather than Thursday.        
        System.out.println(
 
Instant                            // Represent a moment in UTC.
.ofEpochMilli(                     // Parse your count-from-epoch 1970-01-01T00:00:00Z.
    1_564_088_400_000L             // Use underscores where you like, to make numeric literals more readable.
)                                  // Returns an `Instant` object.
.atZone(                           // Adjust from UTC to some time zone.
    ZoneId.of( "Asia/Tokyo" )      // Specify time zone using `Continent/Region` format, never 2-4 letter pseudo-zones such as `EST` or `CST` or `IST`. 
)                                  // Returns a `ZonedDateTime` object.
.getDayOfWeek()                    // Returns a `DayOfWeek` object.
.getDisplayName(                   // Generate automatically-localized string for the name of the day-of-week.
    TextStyle.FULL ,               // How long or abbreviated.
    Locale.US                      // Locale determines (a) human language for translation, and (b) cultural norms for issues such as abbreviation, punctuation, capitalization.
) 
        );
	}
}

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