Calender days allow you to specify special recurrent days and moments. For example it can be used to define holidays. These calendars can be tied to a billing plan, accounts created with this billing plan are only valid on the dates time configured in this calendar day.
Billing → Calendar Days
The next step is to add multiple periods to the billing calendar. Each sub-period has it's own (mandatory) Name and time settings. You can pick a
Start date and
End date or a
Fixed day. You can use dynamic periods to define every n-th weekday of the month. Optionally you can combine all three options with a
Time limit (specify up to second precision). Save with