TemporalAdjusters firstInMonth() method in Java with Examples Last Updated : 27 Dec, 2022 Comments Improve Suggest changes Like Article Like Report The firstInMonth(DayOfWeek) method of a TemporalAdjusters class is used to return a TemporalAdjuster object which can be used to get a new Date object which is the first date of the same month with the same matching DayOfWeek as passed as a parameter from any Date object on which this TemporalAdjuster is applied. Syntax: public static TemporalAdjuster firstInMonth(DayOfWeek dayOfWeek) Parameters: This method accepts dayOfWeek which can be used to get a new Date object which is the first date of the same month with the same matching DayOfWeek. Return value: This method returns the first in month adjuster, not null. Below programs illustrate the TemporalAdjusters.firstInMonth() method: Program 1: Java // Java program to demonstrate // TemporalAdjusters.firstInMonth() import java.time.*; import java.time.temporal.*; public class GFG { public static void main(String[] args) { // get TemporalAdjuster with // the first in month adjuster TemporalAdjuster temporalAdjuster = TemporalAdjusters.firstInMonth( DayOfWeek.SUNDAY); // using adjuster for local date time LocalDate localDate = LocalDate.of(2023, 10, 11); LocalDate firstInMonth = localDate.with(temporalAdjuster); // print System.out.println( "First date in month having" + " sunday for localdate " + localDate + " is: " + firstInMonth); } } Output:First date in month having sunday for localdate 2023-10-11 is: 2023-10-01 Program 2: Java // Java program to demonstrate // TemporalAdjusters.firstInMonth() method import java.time.*; import java.time.temporal.*; public class GFG { public static void main(String[] args) { // get TemporalAdjuster with // the first in month adjuster TemporalAdjuster temporalAdjuster = TemporalAdjusters.firstInMonth( DayOfWeek.TUESDAY); // using adjuster for local date-time LocalDate localDate = LocalDate.of(2023, 10, 11); LocalDate firstInMonth = localDate.with(temporalAdjuster); // print System.out.println( "First date in a month having" + " TUESDAY for localdate " + localDate + " is: " + firstInMonth); } } Output:First date in a month having TUESDAY for localdate 2023-10-11 is: 2023-10-03 References: https://docs.oracle.com/javase/10/docs/api/java/time/temporal/TemporalAdjusters.html#firstInMonth(java.time.DayOfWeek) Comment More infoAdvertise with us A AmanSingh2210 Follow Improve Article Tags : Java Java-Functions java.time.format package Practice Tags : Java Similar Reads Java Tutorial Java is a high-level, object-oriented programming language used to build web apps, mobile applications, and enterprise software systems. 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