Adjusting period
The calendar has regular accounting periods and adjustment accounting periods. The regular periods must be consecutive, with no overlaps or gaps between them. The adjustment periods can overlap with regular periods or other adjustments.
For example, there could be a regular period called DEC-93 covering the full month of December 1993 from December 1st through December 31st, 1993. There could also be an adjustment period called DEC31-93 for just December 31, 1993 that overlaps with the last day of DEC-93.
