time.YearDay()

Leap
Leap in Go 
// Package leap is a small library for determing if the passed in year is a leap year.
package leap

import "time"

// IsLeapYear returns if the passed in year is a leap year.
func IsLeapYear(year int) bool {
	return time.Date(year, time.December, 31, 0, 0, 0, 0, time.UTC).YearDay() == 366
}

This approach may be considered a "cheat" for this exercise. The time.YearDay() function is used to see if December 31 for the year is the 366th day of the year. If there are 366 days in the year, then the function returns true.

11th Sep 2024 · Found it useful?

Other Approaches to Leap in Go

Other ways our community solved this exercise
// Package leap is a small library for determing if the passed in year is a leap year.
package leap

// IsLeapYear returns if the passed in year is a leap year.
func IsLeapYear(year int) bool {
	return  year%4 == 0 && (year%100 != 0 || year%400 == 0)
}
Boolean chain

Use a chain of boolean expressions. 

func IsLeapYear(year int) bool {
	if year%100 == 0 {
		return year%400 == 0
	} else {
		return year%4 == 0
	}
}
Maximum two checks

Use a maximum of two checks. 

package leap

import "time"

// IsLeapYear returns if the passed in year is a leap year.
func IsLeapYear(year int) bool {
	return time.Date(year, time.February, 28, 0, 0, 0, 0, time.UTC).Add(time.Duration(time.Hour*24)).Day() == 29
}
time addition

Use time addition.