package main import ( "fmt" "strconv" "time" ) func daysIn(m int, year int) { var data string dni := time.Date(year, time.Month(m+1),0,0,0,0,0,time.UTC) for i := 1; i <= dni.Day(); i++ { data = strconv.Itoa(year) + "-" + strconv.Itoa(int(m)) + "-" + strconv.Itoa(i) fmt.Println("data: ", data) addRow(data) } }