Background: CWops sponsors the CWops Test, or CWT, which are fun, weekly competitions at times thought to be optimum for amateurs in ITU Regions 1, 2, and 3.

The  CW OPEN (CWO), which is held on the first Saturday in September, is guided by the same principles along with enhancements to make it a serious, annual competitive event.

Object: Work as many CW stations worldwide as possible within each session.

3 Sessions:
00:00 – 03:59 UTC (session 1)
12:00 – 15:59 UTC (session 2)
20:00 – 23:59 UTC (session 3)

Exchange: Serial number + name, Serial numbers start at 001 for each session.