easter

Documentation

Overview

Easter: Chapter 8, Date of Easter

Index

• func Gregorian(y int) (m, d int)
• func Julian(y int) (m, d int)

Examples

• Gregorian
• Julian

Functions

func Gregorian

func Gregorian(y int) (m, d int)

Gregorian returns month and day of Easter in the Gregorian calendar.

Example

package main

import (
	"fmt"
	"time"

	"github.com/soniakeys/meeus/v3/easter"
)

func main() {
	// Example values from p. 68.
	for _, y := range []int{1991, 1992, 1993, 1954, 2000, 1818} {
		m, d := easter.Gregorian(y)
		fmt.Println(y, ":", time.Month(m), d)
	}
}

Output:

1991 : March 31
1992 : April 19
1993 : April 11
1954 : April 18
2000 : April 23
1818 : March 22

func Julian

func Julian(y int) (m, d int)

Julian returns month and day of Easter in the Julian calendar.

Example

package main

import (
	"fmt"
	"time"

	"github.com/soniakeys/meeus/v3/easter"
)

func main() {
	// Example value from p. 69.
	y := 1243
	m, d := easter.Julian(y)
	fmt.Println(y, ":", time.Month(m), d)
}

Output:

1243 : April 12