post
https://api.everee.com/integration/v1/payroll-calendar
Create a payroll calendar that takes effect on a future date. The start day fields you need depend on the payPeriodType: weeklyStartDay for WEEKLY and BI_WEEKLY, and monthlyStartDay for SEMI_MONTHLY and MONTHLY. The effectiveDate must be tomorrow or later, and the displayName must not match another active calendar. See the Guide to the Payroll Calendar API for details.