Date

  getDateISO(selectedDate: Date): string {
 
    const reportDate = new Date(selectedDate.getTime());
 
    const date = reportDate.getDate();
 
    const month = reportDate.getMonth();
 
    const year = reportDate.getFullYear();
 
    reportDate.setUTCFullYear(year, month, date);
 
    reportDate.setUTCHours(0, 0, 0, 0);
 
    return reportDate.toISOString();
 
  }

ISO date

7 days old

var date = new Date();
date.setDate(date.getDate() - 7)