days of a month in a slice

gistfile1.txt

package main

import (
	"fmt"
	"time"
)

func main() {
	year, m := 2018, time.Month(11)
	tfirst := time.Date(year, m, 1, 0, 0, 0, 0, time.UTC)
	wa := int(tfirst.Weekday()) - 1
	tlast := time.Date(year, m+1, 0, 0, 0, 0, 0, time.UTC)
	dz := int(tlast.Day())
	dd := make([][]int, 0)
	row := make([]int, 0)
	x := 0
	for ; x < wa; x++ {
		row = append(row, 0)
	}
	d := 1
	for ; d <= dz; d++ {
		row = append(row, d)
		if (d+wa)%7 == 0 {
			dd = append(dd, row)
			row = make([]int, 0)
		}
	}
	if len(row) > 0 {
		dd = append(dd, row)
	}
	fmt.Println(dd)
}