package main
import (
"fmt"
"time"
)
func findFridayThe13ths(startYear, endYear int) {
for year := startYear; year <= endYear; year++ {
for month := 1; month <= 12; month++ {
date := time.Date(year, time.Month(month), 13, 0, 0, 0, 0, time.UTC)
if date.Weekday() == time.Friday {
fmt.Printf("Friday the 13th: %d-%02d-13\n", year, month)
}
}
}
}
func main() {
findFridayThe13ths(2025, 2031)
}
/*
run:
Friday the 13th: 2025-06-13
Friday the 13th: 2026-02-13
Friday the 13th: 2026-03-13
Friday the 13th: 2026-11-13
Friday the 13th: 2027-08-13
Friday the 13th: 2028-10-13
Friday the 13th: 2029-04-13
Friday the 13th: 2029-07-13
Friday the 13th: 2030-09-13
Friday the 13th: 2030-12-13
Friday the 13th: 2031-06-13
*/
