# Examples of recurrence rules

- For defining payment due dates that occur on the last day of each month for 12 months, the rule is:

{ "rrule" : "RRULE:FREQ=MONTHLY;BYMONTHDAY=28,29,30,31;BYSETPOS=-1;COUNT=12" }

This rule means that if the current month does not contain a 31, then the engine will take into account the 30. If the 30 does not exist, then it will take into account the 29 and so on until the 28.

Another version of this rule:

{ "rrule" : "RRULE:FREQ=MONTHLY;COUNT=5;BYMONTHDAY=-1" }

- For defining payment due dates that occur on the 10th of each month for 12 months, the recurrence rule is:

{ "rrule" : "RRULE:FREQ=MONTHLY;COUNT=12;BYMONTHDAY=10" }

- To schedule installment payments to occur every three months ending December 31st, 2022:

{ "rrule" : "RRULE:FREQ=YEARLY;BYMONTHDAY=-1;BYMONTH=1,4,7,10;UNTIL=20221231" }

The deadlines will occur every 1st of January, April, July and October. Their total number depends on the effective date of the subscription (see parameter vads_sub_effect_date).

- In order to define a weekly recurring payment to be made every Monday:

{ "rrule" : "RRULE:FREQ=WEEKLY;BYDAY=MO" }

The installments will be made every Monday.Attention, the first due date will be on the following Monday.

- In order to define a weekly recurring payment:

{ "rrule" : "RRULE:FREQ=WEEKLY" }

The installments will occur on the same day if the due date is set to "today", then every 7 days.

- In order to define a recurring payment every two weeks on Monday, with maximum 4 installments:

{ "rrule" : "RRULE:FREQ=WEEKLY;INTERVAL=2;COUNT=4;BYDAY=MO" }

- In order to define a recurring payment every two weeks, on the same day and every 7 days:

{ "rrule" : "RRULE:FREQ=WEEKLY;INTERVAL=2;" }