If you work with weeknummers, you can find the weeknumber of a date with the Golang function time.ISOWeek. However you wish to get the first date of a week, there is no such function in Google Go. So let's write it our selfs: func FirstDayOfISOWeek(year int, week int, timezone *time.Location) time.Time { date := time.Date(year, 0, […]