If users would like to test the use of natural language date specification without having to continue to type it into the Schedule Options area of a job, users can evaluate the date with a JAMS powershell commandlet called:
For example: ConvertTo-Date "Last Workday of Month +1"
You can specify additional arguments for this evaluation, such as to specify which start date you wish to evaluate from. Additional help is available using "Help ConvertTo-Date -full" at the powershell prompt.
C:\PS>ConvertTo-Date "first day of month"
Friday, October 01, 2010 12:00:00 AM
C:\PS>ConvertTo-Date yesterday -today 10/25/2007
Wednesday, October 24, 2007 12:00:00 AM