Working with Time Series Data Overview Time Series and SAS Data Sets Dating Observations Subsetting Data and Selecting Observations Storing Time Series in a SAS Data Set Time Series Periodicity and Time Intervals Plotting Time Series Calendar and Time Functions Interval Functions INTNX and INTCK Lags, Leads, Differences, and Summations Transforming Time Series Manipulating Time Series Data Sets Time Series Interpolation Reading Time Series Data Last updated: June 19, 2025