Building and Displaying Dates (Basic Year/Month/Day Operations)

In this lesson you will learn the basics of working with dates through Kotlin's LocalDate, so you can build a date and find its day of the week. This is for anyone searching for "Kotlin LocalDate how to use".

java.time.LocalDate lets you assemble and work with a specific date. Because Kotlin can use the Java standard library directly, Java's rich date-handling APIs are available as they are.

The sample code creates a date with LocalDate.of(2026, 8, 9) and reads the parts with d.year, d.monthValue, and d.dayOfMonth. Notice how the DayOfWeek enum represents the day of the week.

A common stumbling block for beginners is the difference between the Kotlin and Java APIs. A Java method such as getYear() can be reached as though it were a property (year) in Kotlin, and that correspondence takes some getting used to.

In real-world development, date handling - displaying posting timestamps, calculating deadlines - is needed by almost every application.