now.Date()
thisWeek := time.Date(year, month, day, 0, 0, 0, 0, time.Local)
startTime = thisWeek.AddDate...(0, 0, offset+7*week).Format("2006-01-02") + " 00:00:00"
endTime = thisWeek.AddDate(0, 0, offset+6...time.Now().Date()
thisMonth := time.Date(year, month, 1, 0, 0, 0, 0, time.Local)
startTime = thisMonth.AddDate...(0, mon, 0).Format("2006-01-02") + " 00:00:00"
endTime = thisMonth.AddDate(0, mon+1, -1).Format("2006