Retrogression

(or Retrograde Motion) - Movement of a weather system in a direction opposite to that of the basic flow in which it is embedded, usually referring to a closed low or a longwave trough which moves westward.

Sometimes a case that is current one month will not be current the next month. This occurs when the annual numerical limit has been reached. This usually happens near the end of a fiscal year (October 1 to September 30 of the next year). When the new fiscal year begins, the Visa Office gets a new supply of visa numbers and usually brings back the cut-off dates to where they were before retrogression.