import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
public class Main {
public static void main
(String[] args
) { // Let's assume 2021-06-26T23:35:50 is the local date-time in India
LocalDateTime ldtIndia = LocalDateTime.parse("2021-06-26T23:35:50");
Instant instant = ldtIndia.atZone(ZoneId.of("Asia/Kolkata")).toInstant();
long millis = instant.toEpochMilli();
}
}
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