The PERIOD function converts a date to a time period. 

For example, you can use the PERIOD function to show which financial quarter a date falls under. 


ArgumentData type Description
DateDateThe date to convert the time period from.

The PERIOD function returns a time period. 

  • Source must be date formatted.
  • Result must be time period formatted.
  • Result must fall within the time bounds of the model.

In Polaris, you can only use PERIOD in a line item that has a Type of Time Period. The result has the same timescale as the line item type.

In the example, the formula returns the month and quarter for the date 12/02/2015

Period Month has the time period set to month, and Period Quarter has the time period set to quarter.

Key Date

Period Month


Feb 2015

Period Quarter


Q1 FY15