package main
import (
"fmt"
"os"
"strconv"
"time"
)
// Return all last Fridays of each month in a given year
func LastFridaysOfYear(year int) []time.Time {
results := make([]time.Time, 0, 12)
for month := 1; month <= 12; month++ {
// Last day of the month
date := time.Date(year, time.Month(month), 1, 0, 0, 0, 0, time.UTC).
AddDate(0, 1, 0). // AddMonths(1)
AddDate(0, 0, -1) // AddDays(-1)
// Walk backward to Friday
for date.Weekday() != time.Friday {
date = date.AddDate(0, 0, -1)
}
results = append(results, date)
}
return results
}
func main() {
year := 2026
if len(os.Args) > 1 {
if y, err := strconv.Atoi(os.Args[1]); err == nil {
year = y
}
}
for _, date := range LastFridaysOfYear(year) {
fmt.Println(date.Format("01/02/2006"))
}
}
/*
run:
01/30/2026
02/27/2026
03/27/2026
04/24/2026
05/29/2026
06/26/2026
07/31/2026
08/28/2026
09/25/2026
10/30/2026
11/27/2026
12/25/2026
*/
