Hi folks, At various times in the past, people on this list have asked about getting week numbers from DateTime instances. I recently had this requirement, so I wrote a PythonScript to produce an iso_week tuple (year, week_number, dow_monday_is_one__sunday_is_seven) from a DateTime instance. I've submitted the same to the collector as a feature-enhancement patch to DateTime.py. I've tested this by empirically comparing it with the output of mxDateTime's iso_week attribute for all days from 1920-01-01 to some date in the twenty-third century. Note also that this iso_week method does not create additional DateTime instances. See also http://www.cl.cam.ac.uk/~mgk25/iso-time.html -------- PythonScript iso_week Parameters: date doy=date.dayOfYear() dow=(date.dow()-1)%7 y=date.year() thurs_this_week=doy+(3-dow) is_leap=y%4==0 and (y%100!=0 or y%400==0) if thurs_this_week>(is_leap and 366 or 365): week=1 if dow<8: y=y+1 else: mon_this_week=doy-dow day_year_begins=(dow-doy+1)%7 day_of_4_jan=(day_year_begins+3)%7 monday_of_first_week=4-day_of_4_jan week=(mon_this_week-monday_of_first_week)/7+1 if week==0: y=y-1 is_last_leap=y%4==0 and (y%100!=0 or y%400==0) if day_year_begins==4 or (day_year_begins==5 and is_last_leap): week=53 else: week=52 return y,week,dow+1 -------- -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net