| 1 | Reference date Payment terms related to reference date. |
| 2 | Before reference Payment terms related to time before reference date. |
| 3 | After reference Payment terms related to time after reference date. |
| 4 | End of 10-day period containing the reference date |
| 5 | End of 2-week period containing the reference date |
| 6 | End of month containing the reference date |
| 7 | End of the month following the month of reference date |
| 8 | End of quarter containing the reference date |
| 9 | End of year containing the reference date |
| 10 | End of week containing the reference date |
| 11 | End of ten day period following month after reference date's month Self-explanatory. |
| 12 | End of half year containing the reference date End of the half year in which the referred date falls. |