Our pay periods are either monthly or the old way.
Monthly is usually one month behind, (January would be in March, February in April, etc.)
The old way is:
1. December-January-February-March are paid in April.
2. April-May-June are paid in July.
3. July-August are paid in September.
4. September-October-November are paid in December.
All of the above pay dates are completed when there enough funds to pay everyone.