This workflows shows an example of filtering data with flow variables that indicate date and time values. The start and end date are defined as global flow variables and used to filter the output of the Create Date&Time Range node. Since KNIME currently does not have a global flow variable/configuration node denoting date and/or time information, we can use a script that parses the variables and does the filtering. You can inspect and modify the global flow variables by right clicking the workflow in the KNIME Explorer and selecting "Workflow Variables..."